Final Exam Practice

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If 120 mL of 1.30 M NaI is diluted to 1.35 L, the resulting solution contains Question 174 options: 17.5 moles of NaI 0.211 moles of NaI 1.75 moles of NaI 2.11 moles of NaI

0.211 moles of NaI

Calculate the grams of NaOH present in 9.0 mL of a 4% (m/v) NaOH solution. Question 169 options: 3.6 g 0.4 g 4.0 g 0.36 g

0.36 g

What is the molarity of a solution containing 15.0 grams of NH3 in 1.15 liters of solution? Question 183 options: 0.0767 M 0.767 M 1.30 M 13.0 M

0.767 M

dont work

isnt working

Elements in groups IA and IIIA of the periodic table possess, respectively, how many valence electrons? Question 43 options: 1 and 1 8 and 8 1 and 3 3 and 1

1 and 3

Which of the following samples of gas would have a new volume of 3.00 liters if the pressure is decreased from 3.00 atm to 1.00 atm at constant temperature? Question 158 options: no correct response more than one correct response 1.00 L He 5.00 L CO2 9.00 L H2S

1.00 L He

Which of the following statements is correct for 25.0 mL of 3.0 M NH3 solution? (NH3 has a molar mass of 17.0 g.) Question 195 options: more than one correct response 25.0 mL of solvent is present. 0.75 moles of solute is present. no correct response 1.3 grams of solute is present.

1.3 grams of solute is present.

How many total electrons are present in a N3- ion? Question 49 options: 10 7 4 12

Question 21 (1 point) Question 21 Saved The "mathematical meaning" associated with the metric system prefixes centi, milli, and micro is, respectively, Question 21 options: 10-2, 10-4, and 10-6. 10-3, 10-6, and 10-9. 10-2, 10-3, and 10-6. 10-3, 10-9, and 10-12.

10-2, 10-3, and 10-6.

Which of the following solutions will have a molarity of less than 1.0 after 50.0 mL of solvent is added to it? Question 189 options: more than one correct response 10.0 mL of 5.0 M solution 50.0 mL of 3.0 M solution no correct response 575 mL of 1.2 M solution

10.0 mL of 5.0 M solution

What is the volume, in liters, occupied by 2.75 moles of N2 gas at 0.724 atm pressure and a temperature of 97ºC? Question 150 options: 30.2 L ??? L 60.5 L 115.3 L

115.3 L

The formula mass of ammonium chromate, (NH4)2CrO4, is Question 112 options: 152.07 amu 172.09 amu 134.03 amu 148.03 amu

152.07 amu

The total number of atoms present in one formula unit of Mn2(SO4)3 is Question 6 options: 15 16 17 14

The correct electron configuration for 17Cl is Question 29 options: 1s22s22p63s23p64s23d5. 1s22s22p5. 1s22s22p63s23p5. 1s22s22p63s2.

1s22s22p63s23p5.

According to Le Chatelier's principle, which of the following changes will shift the position of the equilibrium to the left for the reaction Question 198 options: decrease the concentration of NH3 increase the concentration of H2 triple the temperature increase the concentration of N2

1st

can't see

1st

doesn't work

1st

doesn't work

1st one

How many unpaired electrons are present in the orbital diagram for an atom whose electron configuration is 1s22s22p4? Question 24 options: 2 1 0 4

The Lewis structure for the polyatomic ion NO2+ contains Question 78 options: 2 single bonds and 12 nonbonding electrons. 2 double bonds and 8 nonbonding electrons. 1 double bond, 1 single bond, and 12 nonbonding electrons. 2 triple bonds and 4 nonbonding electrons.

2 double bonds and 8 nonbonding electrons.

Which set of coefficients balances the equation C4H10 + O2 → CO2 + H2O Question 128 options: 1, 3, 4, 5 1, 6, 4, 5 2, 13, 8, 10 1, 7, 4, 5

2, 13, 8, 10

solution is made by dissolving 0.70 mole of NaI in enough water to give a final volume of 240.0 mL. What is the molarity of the solution? Question 166 options: 0.17 M 2.9 M 2.4 M 1.5 M

2.9 M

Which of the following samples contains the greatest number of atoms? Question 122 options: 20 mole of CSe2 23 moles of CSe 22 moles of N2O 21 moles of He

20 mole of CSe2

Which of the following solutions would always contain 10.0 g of solute per 40.0 g of solvent? Question 190 options: 25.0% (m/v) solution 25.0% (v/v) solution more than one correct response 20.0% (m/m) solution no correct response

20.0% (m/m) solution

In which of the following cases is the given number correctly rounded to three significant figures? Question 15 options: 965,000 becomes 965 57.900 becomes 57,900 24.65 becomes 24.7 0.05285 becomes 0.0528

24.65 becomes 24.7

In which of the following sequences of measured numbers do all members of the sequence contain three significant figures? 3.03 and 3.30 and 0.033 78,000 and 0.00780 and 780 30.0 and 0.300 and 30,100 no correct response more than one correct response

30.0 and 0.300 and 30,100

In which of the following pairs of temperature readings are the two members of the pair equivalent to each other? 0°C and 40°F 0°C and 373 K no correct response more than one correct response 32°F and 273 K

32°F and 273 K

A compound with the formula TeBrn has a formula mass of 447.22 amu. What is the value for n in the formula TeBrn? Question 96 options: 4 6 3 2

In the following reaction, how many grams of H2O are produced if 8.86 g of N2H4 react? Question 103 options: 8.86 g 4.98 g 2.49 g 9.96 g

4.98 g

In which one of the following measure numbers are all of the zeros significant? 6,100,000 0.0400 5.574900 0.000350

5.574900

Which of the following samples has a mass greater than 50.00 grams? Question 123 options: more than one correct response 3.01 × 1023 molecules of CH4 no correct response 6.02 × 1023 atoms of Fe 9.03 × 1023 molecules of H2O

6.02 × 1023 atoms of Fe

Elements in groups IIA and VIIA of the periodic table would, respectively, be expected to form ions with charges of Question 44 options: +2 and +1 -2 and -7 +2 and -1 +2 and +7

+2 and -1

Which of the following is produced in the first step of the dissociation of the acid H3PO4? Question 244 options: PO43- HPO42- H3PO3 H2PO4-

H2PO4-

In which of the following pairs of chemical formulas do both members of the pair have the same number of atoms per molecule? NaSCN and H2CO3 more than one correct response no correct response CoCl2 and COCl2 H3N and NH3

H3N and NH3

n which of the following pairs of substances are both members of the pair salts? Question 234 options: NaCl and NaOH H3PO4 and (NH4)3PO4 more than one correct response KNO3 and K2SO4 no correct response

H3PO4 and (NH4)3PO4

In which of the following pairs of acids are both members of the pair polyprotic? Question 229 options: H2SO4 and HC2H3O2 HNO3 and H2C4H4O6 H3PO4 and H2C4H4O7 HC2H3O2 and H3C6H5O7

H3PO4 and H2C4H4O7

Which of the following molecular compounds would have a Lewis structure that contains 10 electron dots? Question 88 options: HCN H2O NH3 CO2

HCN

n which of the following pairs of acids are both members of the pair strong acids? Question 231 options: no correct response HNO3 and HNO2 more than one correct response H2SO4 and H2SO3 HCl and HClO4

HCl and HClO4

In which of the following pairs of acids are both members of the pair strong acids? Question 230 options: H2CO3 and HBr HC2H3O2 and HI HCl and HNO3 H3PO4 and H2SO4

HCl and HNO3

Which of the following equations represents an acid-base neutralization reaction? Question 240 options: no correct response Ba(OH)2 + Na2SO4 → BaSO4 + 2NaOH HNO3 + KOH → KNO3 + H2O more than one correct response H2SO4 + Zn → ZnSO4 + H2

HNO3 + KOH → KNO3 + H2O

Which of the following pairings of pH and hydronium ion concentration is correct? Question 245 options: pH = 7.0; [H3O+] = 1 × 10-7 no correct response pH = 2.0; [H3O+] = 1 × 102 more than one correct response pH = 9.0; [H3O+] = 9 × 10-9

pH = 7.0; [H3O+] = 1 × 10-7

For which of the following types of ionic compounds are most examples insoluble in water? Question 173 options: sulfates bromides nitrates phosphates

phosphates

*The quantity "A + Z" gives the number of possible subatomic particles in an atom nuclear particles in an atomic nucleus electrons in an atomic nucleus neutrons in an atom

possible subatomic particles in an atom

Electronegativity is a concept that is useful along with other concepts in Question 64 options: deciding how many electrons are involved in a bond. determining the charge on a polyatomic ion. formulating a statement of the octet rule. predicting the polarity of a bond.

predicting the polarity of a bond.

Which of the following descriptions apply to matter in the gaseous state? Question 154 options: definite shape and definite volume no correct response disruptive and cohesive forces are about equal more than one correct response pressure change significantly influences the volume

pressure change significantly influences the volume

According to the Bronsted-Lowry theory, a base is a(n) Question 220 options: electron donor. electron acceptor. proton donor. proton acceptor.

proton acceptor.

Chemical equilibrium is reached in a system when Question 200 options: more than one correct response reactants are being consumed at the same rate they are being produced. reactant and product concentrations are equal. no correct response complete conversion of reactants to products has occurred.

reactants are being consumed at the same rate they are being produced.

The calculator answer obtained from multiplying the measurements 46.47 and 7.75 is 360.14. Given the operational rules governing significant figures this answer Question 22 options: could be written as ???????? should be rounded to 360.1 is correct as written should be rounded to 360

should be rounded to 360

Which of the following is a molecular compound that contains 5 atoms per molecule? Question 86 options: silicon tetraiodide diarsenic pentaselenide carbon dioxide ditellerium monoxide

silicon tetraiodide

A period 2 nonmetal, X, forms the molecular compound NX3. Which of the following are also correct formulas for molecular compounds involving X? Question 61 options: more than one correct response OX2 HX C2X no correct response

OX2

Which of the following statements concerning a saturated solution is incorrect? Question 192 options: Undissolved solute may or may not be present. Undissolved solute, if present, is continually dissolving. Undissolved solute, if present, is in equilibrium with dissolved solute. Undissolved solute must be present.

Undissolved solute must be present.

Which of the following statements about intermolecular forces is incorrect? Question 159 options: They occur within molecules rather than between molecules. They must be overcome in order for molecules to escape from the liquid state into the vapor state. They are much weaker than intramolecular forces. They are electrostatic in origin.

They occur within molecules rather than between molecules.

Which of the following statements concerning subatomic particles is correct? Question 38 options: Four fundamental types exist, two of which are charged. Three fundamental types exist, none of which are charged. Three fundamental types exist, two of which are charged. Four fundamental types exist, all of which are charged.

Three fundamental types exist, two of which are charged.

Boyle's law involves which of the following? Question 132 options: a constant temperature a constant pressure a direct proportion a constant volume

a constant temperature

If some of the vapor is allowed to escape from a sample where liquid and vapor are in equilibrium, the immediate result is Question 135 options: a decrease in evaporation rate. more than one correct response a decrease in condensation rate. no correct response an increase in intermolecular force strength.

a decrease in evaporation rate.

Charles's law involves which of the following? Question 133 options: an indirect proportion more than one correct response constant temperature a fixed quantity of gas no correct response

a fixed quantity of gas

The description "two substances present, two phases present" is correct for Question 5 options: a mixture of ice and water. more than one correct response no correct response a mixture of oil and water. a mixture of milk and water.

a mixture of oil and water.

If the pH of a solution is 6.4, the salt must be on which could be formed from the neutralization of Question 225 options: a weak acid and a strong base a strong acid and a weak base a strong acid and a strong base HBr and KOH

a strong acid and a weak base

The nucleus of an atom Question 32 options: accounts for a large amount of mass of an atom has no charge because the protons and electrons cancel each other out attracts the neutral neutrons in an atom contains neutrons and electrons

accounts for a large amount of mass of an atom

The modern periodic table arranges the elements in order of Question 31 options: increasing reactivity with oxygen. year of discovery. increasing number of protons. decreasing size of the nucleus.

increasing number of protons.

Determining the concentration of an acid using an acid-base titration always involves completely reacting a measured volume of the acid with a known volume of Question 222 options: 1.0 M indicator. base of known concentration. indicator of known concentration. 1.0 M base.

indicator of known concentration.

The correct name for the ionic compound In2Se3 is Question 60 options: indium triselenide indium(III) selenide indium selenide diindium triselenide

indium selenide

The solubility rule "like dissolves like" is not adequate for predicting solubilities when the solute is a(n) Question 182 options: nonpolar liquid. nonpolar gas. ionic compound. polar gas.

ionic compound.

Which of the following statements correctly characterizes the subatomic particle called a neutron? Question 39 options: it contributes 75% of the mass of an atom its mass is half that of a proton its charge is twice that of an electron it has no charge

it has no charge

Combustion reactions are characterized by Question 203 options: both reactants always being elements. oxygen always being one of the reactants. carbon dioxide always being one of the products. water always being one of the products.

oxygen

The elements in group IVA of the periodic table all have electron configurations ending in Question 30 options: s2. p4. p2. d4.

p2.

The phrases "particles close together and held in fixed positions" and "completely fills the container" apply, respectively, to Question 149 options: solids and gases. gases and liquids. liquids and solids. liquids and gases.

solids and gases.

A solution with a pH of 12.2 is Question 219 options: weakly acidic strongly acidic strongly basic weakly basic

strongly basic

n which of the following pairs of state changes is the final state (solid, liquid, gas) the same for both members of the pair? Question 142 options: condensation and freezing no correct response deposition and melting more than one correct response sublimation and evaporation

sublimation and evaporation

In the neutralization reaction between 0.4 M Co(OH)3 and 0.4 M HNO3, the acid and base will react in a molar ratio of Question 226 options: one to three three to one one to one three to three

three to one

VSEPR theory predicts that the geometry of the NCl3 molecule is Question 82 options: tetrahedral linear trigonal planar trigonal pyramidal

trigonal planar

How many conversion factors can be derived from the equality 365 days = 1 year? Question 13 options: two three four an unlimited number

two

If object A weighs 4.0 grams and has a volume of 2.0 mL and object B weighs 6.0 grams and has a volume of 1.50 mL, Question 14 options: B is twice as dense as A A and B have equal densities B is less dense than A B is four times as dense as A

B is twice as dense as A

For which of the following pairs of compounds do both members of the pair have names that contain the prefix di-? Question 65 options: more than one correct response N2O3 and H2S no correct response SCl2 and K2O CO2 and N2O

CO2 and N2O

Which of the following is not a conjugate acid/base pair? Question 243 options: OH-/O2- NH4+/NH3 H3PO4/H2PO4- CO2/CO3-

CO2/CO3-

In which of the following pairs of elements are both members of the pair in the same period in the periodic table? Mg and Ne Cu and Ag Ca and Se F and Cl

Ca and Se

In which of the following compounds does Cl have an oxidation number of +5? Question 210 options: Ca(ClO3)2 HClO KClO2 no correct response more than one correct response

Ca(ClO3)2

A mole of a chemical substance represents Question 97 options: 6.02 × 1023 chemical particles of the substance. the mass of the substance that will combine with 12.0 g of carbon. the mass of the substance that will combine with 100.0 g of oxygen. 6.02 × 10-23 grams of the substance.

6.02 × 1023 chemical particles of the substance.

Avogardro's number of germanium (Ge) would have a mass of Question 100 options: 6.02 × 1023 g 37 6.02 × 10-23 g 73

6.02 × 1023 g

Which of the following solutions is hypertonic with respect to blood? Question 188 options: 0.7% (m/v) KCl 2.5% (m/v) glucose 6.5% (m/v) glucose 0.2% (m/v) KCl

6.5% (m/v) glucose

How many times larger in size is the atmosphere pressure unit than the mm Hg pressure unit? Question 134 options: 1000 325 100 760

760

Which of the following pressure relationships is correct? Question 157 options: 760 torr = 760 mm Hg no correct response 1 atm = 15.8 psi 650 torr = 1 atm more than one correct response

760 torr = 760 mm Hg

Question 48 (1 point) Question 48 Saved How many electrons appear in the Lewis symbol for an element whose electron configuration is 1s22s22p4? Question 48 options: 6 2 8 4

If a solution is buffered at a pH of 9.1, then the addition of a small amount of acid will cause the solution to have a pH of approximately 9.1 10.1 8.1 7.1

8.1

Question 168 (1 point) Question 168 Saved Calculate the concentration in % (m/m) of a solution containing 28.0 g of LiF dissolved in 310.0 g of H2O. Question 168 options: 8.19% (m/m) 9.93% (m/m) 8.28% (m/m) 9.03% (m/m)

9.03% (m/m)

doesn't work

???

The atomic masses of He and Be are 4.00 and 9.01 amu, respectively. Which of the following statements are true? A mole of Be contains the same number of atoms as a mole of He. A mole of He is heavier than a mole of Be. no correct response more than one correct response A mole of Be contains more atoms than a mole of He.

A mole of Be contains the same number of atoms as a mole of He.

In which of the following pairs of elements are both members of the pair metals? Question 25 options: N and O Ag and Pb Al and Cl Nb and Rn

Ag and Pb

For which of the following elements is the listed number of valence electrons correct? Question 46 options: Cl - 5 valence electrons no correct response Si - 2 valence electrons more than one correct response Al - 3 valence electrons

Al - 3 valence electrons

The correct formula for the ionic compound containing Al3+ and O2- ions would be Question 58 options: Al2O3 Al3O2 Al2O AlO

Al2O3

In which of the following liquids would London forces be the predominant intermolecular force? Question 138 options: Br2 HCl IBr H2Te

Br2

Which of the following diatomic molecules contains the bond of greatest polarity? Question 85 options: ClBr O2 BrF Br2

BrF

Consider the following substances and their polarities: A - polar, B - polar, C - nonpolar, D - nonpolar. It is true that Question 171 options: more than one correct response D is more soluble in B than in C. C is more soluble in D than in A. A is more soluble in C than in B. no correct response

C is more soluble in D than in A.

For which of the following compounds does 1.9 g represent 4.3 × 10-2 moles of compound? Question 101 options: C3H8 no correct response CO2 more than one correct response H2O2

C3H8

In which of the following groups of substances do all members of the group have atomic masses that are within 1.00 amu of each other? Question 104 options: C3H8, CO2, N2O CO, N2, NO no correct response more than one correct response CH4, NH3, H2O

C3H8, CO2, N2O

Which of the following tetrahedral molecules is polar? Question 95 options: no correct response more than one correct response CH4 CF4 CH3F

CH3F

Which of the following compounds has the largest formula mass? Question 115 options: CO H2O NH3 BeH2

Given the following electronegativites: Rb = 0.8, H = 2.1, Cl = 3.0 which of the following statements is true? Question 68 options: Cl2 is a nonpolar covalent molecule and HCl is a polar covalent molecule HCl is a nonpolar covalent compound and Cl2 is a polar covalent molecule RbCl is a nonpolar covalent compound and HCl is an ionic compound H2, Cl2, and HCl are nonpolar covalent molecules

Cl2 is a nonpolar covalent molecule and HCl is a polar covalent molecule

Question 126 (1 point) Question 126 Saved Which of the following substances has a formula mass that is greater than 80.0 amu? Question 126 options: SO2 no correct response Cl2O more than one correct response OF2

Cl2O

In writing an equilibrium constant expression, which of the following is incorrect? Question 212 options: more than one correct response Concentrations of pure solids and pure liquids are always placed in the denominator of the expression. Concentrations are always expressed in molarities. no correct response Product concentrations are always placed in the numerator of the expression.

Concentrations of pure solids and pure liquids are always placed in the denominator of the expression.

Which of the following statements contrasting covalent bonds and ionic bonds is correct? Question 94 options: Covalent bonds usually involve two metals and ionic bonds usually involve a metal and a nonmetal. Covalent bonds usually involve two nonmetals and ionic bonds usually involve a metal and a nonmetal. Covalent bonds usually involve a metal and a nonmetal and ionic bonds usually involve two nonmetals. Covalent bonds usually involve two nonmetals and ionic bonds usually involve two metals.

Covalent bonds usually involve two nonmetals and ionic bonds usually involve a metal and a nonmetal.

Which of the following compounds contains both ionic and covalent bonds? Question 84 options: NF3 KI CsCN NO2

CsCN

In which of the following sets of ionic compounds are all members of the set insoluble in water? Question 180 options: more than one correct response CuCO3, CaCO3, MgCO3 PbSO4, FeSO4, BaSO4 AgCl, PbCl2, NH4Cl no correct response

CuCO3, CaCO3, MgCO3

Which of the following species is formed in the second step of the ionization of the triprotic acid H3PO4? Question 246 options: H3O+ HPO42- no correct response H2PO4- more than one correct response

Which of the following statements concerning dialysis is correct? Question 193 options: Dissolved ionic substances and small molecules are separated from colloidal particles. more than one correct response no correct response Two types of colloidal particles are separated from each other. Only water passes through the dialyzing membrane.

Dissolved ionic substances and small molecules are separated from colloidal particles.

Which one of the following statements about atoms is incorrect? Question 11 options: Only one kind of atom may be present in a homoatomic molecule. Free isolated atoms are rarely encountered in nature. Atoms may be decomposed using chemical change. An atom is the smallest "piece" of an element that can exist and still have the properties of the element.

Free isolated atoms are rarely encountered in nature.

n the redox reaction 2FeBr3 + GeI2 → 2FeBr2 + GeI4 Question 209 options: GeI2 is the oxidizing agent Ge undergoes an oxidation number change of 2 units Fe undergoes an oxidation number change of 6 units FeBr3 is the substance oxidized

GeI2 is the oxidizing agent

In which of the following pairs of triatomic species do both members of the pair have the same geometry? Question 75 options: no correct response H2O and H2S NO2+ and NO2- more than one correct response HCN and FNO

H2O and H2S

Which of the following statements concerning evaporation is incorrect? Question 160 options: Evaporation causes the liquid temperature to decrease. Molecules with energies considerably above average are those which escape from the liquid. Increasing the temperature of the liquid increases the rate of evaporation. Increasing the surface area of the liquid decreases the rate of evaporation.

Increasing the surface area of the liquid decreases the rate of evaporation.

Which of the following element-classification pairings is incorrect? Question 36 options: O - representative element Ir - inner-transition element V - transition element Xe - noble gas element

Ir - inner-transition element

Which of the following statements concerning Avogadro's number is correct? Question 124 options: It denotes the number of molecules in one mole of any molecular substance. It denotes the number of atoms in one mole of any substance. It has the value 6.02 × 10-23. It is the mass, in grams, of one mole of any substance.

It denotes the number of molecules in one mole of any molecular substance.

Which of the following statements about heterogeneous and homogeneous mixtures is correct? Question 9 options: All of the phases in a heterogeneous mixture must be in the same state. No two phases in a heterogeneous mixture can be in the same state. It is possible to have heterogeneous mixtures in which all the components are liquids. A homogeneous mixture contains visibly different parts, or phases.

It is possible to have heterogeneous mixtures in which all the components are liquids.

In which of the following ionic compounds are ions with a +1 charge present? Question 52 options: Ca2Si Tl2O3 CaS K2O

K2O

The correct formula for the ionic compound formed between K and N is Question 59 options: K3N2 K3N KN3 K2N3

K3N

A buffer solution could be prepared from Question 218 options: KC2H3O2 and HC2H3O2 LiCl and NaCl RbCl and HCl NaOH and HCl

KC2H3O2 and HC2H3O2

In which of the following pairs of salts will both members of the pair hydrolyze in water to give solutions that are basic? Question 232 options: KC2H3O2 and LiF NH4I and NH4NO3 NaNO3 and K2SO4 KI and NaCN

KC2H3O2 and LiF

Which of the following statements is correct? Question 161 options: Dipole-dipole interactions occur only between nonpolar molecules. London forces are "instantaneous" dipole-dipole interactions. A hydrogen bond is an extremely weak dipole-dipole interaction. Hydrogen bonding occurs anytime a hydrogen-containing molecule is present in a liquid.

London forces are "instantaneous" dipole-dipole interactions.

In which of the following pairings is the chemical formula not consistent with the ions shown? Question 53 options: M2+, X-, MX2 no correct response M+, X3-, MX3 M2+, X3-, M3X2 more than one correct response

M+, X3-, MX3

For which of the following pairs of elements would the compound formed between them most likely be a molecular compound? Question 66 options: Na and Cl Si and F Mg and S Sr and F

Mg and S

Which of the following statements concerning differences between ionic and molecular compounds is correct? Question 91 options: more than one correct response Molecular compounds contain two elements, and ionic compounds contain three or more elements. Molecular compounds possess a molecular structural unit, and ionic compounds do not. Ionic compounds contain oxygen, and molecular compounds do not. no correct response

Molecular compounds possess a molecular structural unit, and ionic compounds do not.

Which of the following statements concerning the chemical symbols for the elements is correct? Question 10 options: Most elements have two-letter chemical symbols. more than one correct response All chemical symbols start with the first letter of the element's English name. Synthetic elements have one-letter symbols and naturally-occurring elements have two-letter symbols. no correct response

Most elements have two-letter chemical symbols.

Which of the following statements concerning factors that affect solute solubility is incorrect? Question 194 options: Most solid solutes become less soluble in water with decreasing pressure. Gaseous solutes become more soluble in water with increasing pressure. Most solid solutes become more soluble in water with increasing temperature. Gaseous solutes become less soluble in water with increasing temperature.

Most solid solutes become less soluble in water with decreasing pressure.

Which of the following linear molecules is a nonpolar molecule containing polar bonds? Question 87 options: O = C = O H - C ≡ N N ≡ N H - Cl

N ≡ N

Which of the following chemical equations is balanced? Question 114 options: 2H2 + O2 → H2O 2SO2 + 2 O2 → 3 SO3 KClO3 → KCl + 3 O2 N2 + 3H2 → 2NH3

N2 + 3H2 → 2NH3

In which of the following pairs of chemical formulas do both formulas represent compounds? O2 and O3 HCN and N2 CO2 and O2 N2O4 and NO2

N2O4 and NO2

In the reaction N3- + H2O → HN3 + OH-, the Bronsted-Lowry base is Question 227 options: OH-. H2O. HN3. N3-.

N3-.

In which of the following pairs of substances are both members of the pair salts? Question 233 options: H2SeO4 and SrSeO4 HNO3 and NaOH NH4F and CsF NaBr and NaOH

NH4F and CsF

NOT WORKING

NOT WORKING (putting 4)

NOT WORKING QUESTION

NOT WORKING QUESTION (answered as 3rd...)

In which of the following unbalanced equations are 5 moles of reactants required to produce 2 moles of products? Question 107 options: more than one correct response no correct response Na + N2 → NaN3 Al + S → Al2S3 N2 + H2 → NH3

Na + N2 → NaN3

In which of the following pairs of ionic compounds do both members of the pair contain +1 ions? Question 55 options: no correct response AlCl3 and MgF2 KCl and CaO Na3N and Li2S more than one correct response

Na3N and Li2S

In which of the following pairings of compounds are both members of the pair strong electrolytes? Question 228 options: NaBr and LiI NaBr and HBr KF and H2CO3 NH3 and HCl

NaBr and HBr

In which of the following pairs of ionic compounds are both members of the pair soluble in water? Question 178 options: NaOH and Cs2SO4 AgNO3 and AgCl BaSO4 and BaCO3 NH4Br and Fe3(PO4)2

NaOH and Cs2SO4

In which of the following molecules is a coordinate covalent bond present? Question 72 options: N ≡ N H - C ≡ N N ≡ N - O O = C = O

O = C = O

Which of the following sets of elements is arranged in order of decreasing electronegativity? Question 89 options: Cl, B, S I, Cl, As B, Si, N O, S, As

O, S, As

Which of the following statements concerning coordinate covalent bonds is correct? Question 90 options: One of the atoms involved must be a metal and the other a nonmetal. Once formed, they are indistinguishable from any other covalent bond. Both atoms involved in the bond contribute three electrons to the bond. They occur only in molecules where all bonds are single bonds.

One of the atoms involved must be a metal and the other a nonmetal.

In which of the following pairs of bonds is the first listed bond more polar than the second listed bond? Question 73 options: P-Cl and S-Cl more than one correct response no correct response C-N and C-F N-N and N-F

P-Cl and S-Cl

In which of the following molecular compounds are all the bonds single bonds? Question 71 options: CS2 O2 PH3 CSe

PH3

DOESNT WORK

PICKED 1st

The correct form of the equation for the ideal gas law is Question 147 options: PV = n/RT. PT = nRV. PV = nRT. P/V = nRT.

PV = nRT.

Which of the following statements is not a part of kinetic molecular theory? Question 162 options: Matter is composed of particles that are in constant motion. Particle velocity increases as the temperature increases. Particles in a system cannot transfer energy to each other. Particle interactions involve electrostatic attractions and repulsions.

Particles in a system cannot transfer energy to each other.

Which of the following descriptions apply to matter in the liquid state? Question 152 options: Temperature change significantly influences the volume. Particles transfer energy from one to another through collisions. no correct response more than one correct response Particles are less free to move about than in the solid state.

Particles transfer energy from one to another through collisions.

In which of the following pairs of compounds are both members of the pair ionic compounds? Question 54 options: RbF and SrO LiF and H2S PI3 and HF H2Se and PF3

RbF and SrO

In which of the following sequences of sulfur-containing ions are the ions arranged in order of decreasing oxidation number for S? Question 211 options: SO32-, SO42-, S2- S2O32-, SO32-, SO42- more than one correct response no correct response SO42-, S2O32-, S2-

SO42-, S2O32-, S2-

Which of the following does not describe an acidic solution? Question 239 options: The [H3O+] is greater than the [OH-] The [OH-] is greater than 1.0 10-7 The [OH-] is 6.0 10-10 The pH is less than 7.0

The [OH-] is 6.0 10-10

Which of the following is a correct statement for a solution with a pH of 8.00? Question 242 options: The hydroxide ion concentration is greater than the hydronium ion concentration. The hydronium ion concentration is 8.0 M. The hydroxide ion concentration is 1.0 × 10-8 M. more than one correct response no correct response

The hydroxide ion concentration is greater than the hydronium ion concentration.

To determine the formula mass of a compound you should Question 113 options: add up the atomic masses of all the atoms present and divide by the number of atoms present. add up the atomic numbers of all the atoms present and divide by the number of atoms present. add up the atomic masses of all the atoms present. add up the atomic numbers of all the atoms present.

add up the atomic masses of all the atoms present.

Tin is element number 50. This means that all tin atoms have no correct response a total of 50 subatomic particles in the nucleus. an atomic number of 50. more than one correct response 50 neutrons in the nucleus.

an atomic number of 50.

What is the geometry of the molecular compound formed by the reaction of sulfur with hydrogen? Question 83 options: angular linear trigonal planar tetrahedral

angular

A colloidal dispersion differs from a true solution in that colloidal particles Question 164 options: are large enough to scatter light. are large enough to be seen with a microscope. are large enough to be seen with the naked eye. tend to settle at an appreciable rate

are large enough to scatter light.

The "octet rule" relates to the number eight because Question 57 options: all electron subshells can hold 8 electrons. only atoms with 8 valence electrons undergo chemical reaction. ions with charges of +8 and -8 are very stable. atoms, during compound formation, frequently obtain 8 valence electrons.

atoms, during compound formation, frequently obtain 8 valence electrons.

Increasing the temperature at which a chemical reaction occurs Question 214 options: will lower the activation energy. increase disorder in the system, thus decreasing the reaction rate. cause more reactant collisions to take place in a given time. more than one correct response no correct response

cause more reactant collisions to take place in a given time.

In which of the following pairs of properties are both properties chemical properties? decomposes on contact with water and reacts with nitric acid good reflector of light and is blue in color melts at 84ºC and flammable has a density of 2.54 g/mL and can be shaped into sheets

decomposes on contact with water and reacts with nitric acid

f the pH of a solution increases from 1.0 to 3.0 the hydronium ion concentration Question 224 options: decreases by a factor of 3.0 increases by a factor of 100 increases by a factor of 3.0 decreases by a factor of 100

decreases by a factor of 100

155

didn't work 1st

What volume, in milliliters, of 7.5 M KBr is needed to prepare 120 mL of 0.20 M KBr by dilution? Question 184 options: mL mL 4.5e3 mL 3.2 mL

didn't work so 1

How many molecules of CO2 are present in 51.5 of CO2? Question 102 options:

didn't work so 1st

0.450 M solution of LiBr which contains 0.100 mole of solute would have a volume, in milliliters, of Question 163 options: 45.0 mL 90.0 mL mL mL

didn't work...chose third

Indicate what the missing words are in the following statement of Charles' law: At constant pressure, the volume of a gas sample is _______ proportional to its _______ temperature. Question 143 options: directly; Kelvin inversely; Celsius inversely; Kelvin directly; Celsius

directly; Kelvin

Which of the following characterizations for the element 52Te is correct? Question 35 options: electron configuration involves a partially filled s subshell both a representative element and a metal electron configuration involves a total of 52 electrons more than one correct response no correct response

electron configuration involves a total of 52 electrons

For a system at chemical equilibrium, Question 205 options: reactant and product concentrations are zero. forward and reverse reaction rates are zero. reactant and product concentrations are equal. forward and reverse reaction rates are equal.

forward and reverse reaction rates are equal.

In which of the following pairs of physical changes are both changes exothermic? Question 141 options: freezing, condensation freezing, melting melting, sublimation sublimation, evaporation

freezing, condensation

Isotopes of a given element Question 27 options: have different mass numbers but identical numbers of protons. have the same mass number but different numbers of protons. have the same atomic number but different chemical properties. have the same mass number but different chemical properties.

have different mass numbers but identical numbers of protons.

or a collision between molecules to result in reaction, the molecules must possess a certain minimum energy and Question 204 options: interact with a catalyst for at least 1 second. have a favorable orientation relative to each other when they collide. no correct response exchange electrons. more than one correct response

have favorable orientation

The correct name for the compound H2Te is Question 77 options: dihydrogen monotelluride dihydrogen telluride hydrogen monotelluride hydrogen telluride

hydrogen telluride

Crenation of red blood cells occurs when the cells are placed in a(n) Question 172 options: hypertonic solution. hypotonic solution. isotonic solution. physiological saline solution.

hypertonic solution.

Le Chatelier's principle states that Question 215 options: only exothermic reactions can reach chemical equilibrium. only reactions in which a catalyst is present can reach chemical equilibrium. if a chemical equilibrium is disturbed, the temperature of the system will always decrease. if a chemical equilibrium is disturbed, the system will try and reestablish equilibrium. Save

if a chemical equilibrium is disturbed, the system will try and reestablish equilibrium. Save

For representative elements, valence electrons are those electrons located Question 45 options: closest to the nucleus. in the outermost shell. in s orbitals. in the outermost subshell.

in the outermost shell.

Most reactions are carried out in liquid solution or in the gaseous phase because in such situations Question 216 options: activation energies are higher. products are less apt to decompose. kinetic energies of reactants are lower. it is easier for reactants to come in contact with each other.

it is easier for reactants to come in contact with each other.

In which of the following groupings of terms are the three terms closely related? Question 137 options: potential energy, energy of attraction, disruptive forces kinetic energy, electrostatic interactions, disruptive forces potential energy, electrostatic interactions, cohesive forces kinetic energy, energy of motion, cohesive forces

kinetic energy, electrostatic interactions, disruptive forces

Formation of a positive ion is the result of an atom Question 47 options: gaining one or more electrons. losing one or more protons. losing one or more electrons. gaining one or more protons.

losing one or more electrons.

Compared to pure water, a 1 M sugar-water solution will have a Question 170 options: lower vapor pressure, lower boiling point and higher freezing point. higher vapor pressure, higher boiling point and higher freezing point. lower vapor pressure, lower boiling point and lower freezing point. lower vapor pressure, higher boiling point and lower freezing point.

lower vapor pressure, higher boiling point and lower freezing point.

The pH of a buffered solution Question 237 options: more than one correct response changes drastically when a small amount of acid is added. always equals 7.0. no correct response may be acidic or basic depending on the buffer present.

may be acidic or basic depending on the buffer present.

The defining expression for the molarity concentration unit is Question 181 options: moles of solute/liters of solution. grams of solute/liters of solvent. grams of solute/liters of solution. moles of solute/liters of solvent.

moles of solute/liters of solution.

A 1.00 mole sample of a gas would have a volume of 0.821 L at which of the following temperature and pressure conditions? Question 129 options: 300 K and 30.0 atm -123º C and 15.0 atm no correct response 300º C and 10.0 atm more than one correct response