Chemistry Final Questions

The correct formula for ammonium sulfate is? A) NH₄SO₃ B) NH₄SO₄ C) Na₂(CO₃)₂ D) (NH₄)₂SO₄ E) (NH₃)₂(CO)₂

(NH₄)₂SO₄

The formula for the compound formed from ammonium and sulfate ions is? A) NH₄SO₄ B) (NH₄)₂SO₄ C) NH₄(SO₄)₂ D) (NH₄)₃SO₄ E) none of these

(NH₄)₂SO₄

The formula for the compound formed from the polyatomic ions NH₄⁺ and PO₄³⁻? A) NH₄(PO₄)₃ B) NH₄PO₄ C) (NH₄)₃PO₄ D) (NH₄)₃PO₄

(NH₄)₃PO₄

13.4 of Mg represents how many moles? A) 0.551 mol B) 3.26 x 10² C) 1.81 mol D) 37.7 E) none of these

0.551 mol

How many of the following are pure compounds? sodium, sugar, oxygen, air, iron A) 4 B) 1 C) 5 D) 3 E) 2

1

Which represents the greatest mass? A) 1.0 mol Rb B) 1.0 mol Ti C) 1.0 mol Al D) 1.0 mol Al E) all the same

1.0 mol Rb

Express 1840000 in scientific notation? A) 1.84 x 10⁴ B) 5.41 x 10⁻⁸ C) 1.84 x 10⁶ D) 1.84 x 10⁻⁶ E) 184 x 10⁶

1.84 x 10⁶

A solution with pH of 2 is how many times more acidic as a solution with a pH of 6? A) 3 B) 0.3 C) 100000 D) 10000 E) 8

10000

The atom with 69 neutrons and 50 protons has a mass number of? A) 119 B) 50 C) 19 D) cannot be determined from information given E) 69

119

How many protons, electrons and neutrons, respectively does ³¹P have? A) 15, 15, 16 B) 15, 31, 16 C) 15, 15, 31 D) 16, 15, 31 E) 15, 16, 15

15, 15, 16

How many moles of Ca are in 613.3 g Ca A) 15.30 mol B) 6.535 x 10⁻² mol C) 2.458 x 10⁴ mol D) 30.60 mol E) 613.3

15.30 mol

How many hydrogen atoms are indicated by the formula (NH₄)₂C₆H₈)₂? A) 16 B) 8 C) 24 D) 14 E) 12

16

How many atoms are represented by one formula unit of aluminum chromate, Al₂(CrO₄)₃? A) 15 B) 3 C) none of these D) 17 E) 21

17

Pb(s) + AgNO₃(aq)→Pb(NO₃)₂ + Ag(s) A) 1 B) 2 C) 4 D) 5 E) 6

2

When the following equation is balanced using the smallest possible integers, what is the number in front of the substance in bold type? A) 5 B) 4 C) 3 D) 2 1

2

When the following equation is balanced using the smallest possible integers, what is the number in front of the substance is bold type? *Na₂S₂O₃* + NaI + Na₂S₄O₆ A) 1 B) 2 C) 3 D) 4 E) 6

2

If a 100 g sample of platinum metal has a volume of 4.671, what is the density of platinum in g/cm³? A) 0.0467 g/cm³ B) 2.14 g/cm³ C) 467 g?cm³ D) 21.4 g/cm³ E) none of these

21.4 g/cm³

How many significant figures are in the number 0.00204? A) 6 B) 3 C) 2 E) 5

3

The number 3.00183 rounded to four significant figures is? A) 3.000 B) 3.001 C) none of these D) 3.002 E) 3.183

3.001

The molar mass of calcium phosphate, Ca₃(PO₄)₂ is? A) 310.18 g/mol B) 365.07 g/mol C) 230.02 g/mol D) 215.21 g/mol E) 278.18 g/mol

310.18 g/mol

Using zero as your reference point, how much liquid has left the buret? Use the correct number of significant figures. ( Insert picture later) A) 22 ml B) 38 ml C) 22 ml D) 20 ml E) 38.0 ml

38.0

What is the mass of 5.826 moles of Ca(OH)₂? A) 431.7 g B) 7.863 x 10⁻² C) 12.718 g D) 863.4 g E) 74.10

431.7 g

How many of the following are compounds? H₂O, N₂O₄, NaOH, MnO₂, HF A) 5 B) 1 C) 4 D) 3 E) 2

5

How many significant figures are in the number 1000.0? A) 2 B) 3 C) 1 D) 4 E) 5

5

A piece of unknown metal weights 400.1g and occupies a volume of 72.2 mL. What is the density of this metal? A) 55.4 g/mL B) 2.89 x 10⁴ g/mL C) 0.180 g.mL D) none of these E) 5.54 g/mL

5.54 g/mL

A sample of argon gas occupies a certain volume at 15°C. At what temperature would the volume of the gas be three times as big? Assume the pressure remains constant. A) 864°C B) 45°C C) 318°C D) 591°C E) 1137°C

591°C

4.04 moles of water weighs A) 72.8 g B) 2.24 x 10⁻¹ g C) 4.46 g D) 863.4 g E) 74.10 g

72.8 g

Using the rules of significant figures calculate the following: 70+4.461 A) 70 B) 75 C) 74 D) 74.46 E) 74.461

74

A hydrocarbon has the formula C₅H₁₂? What is the percent by mass of carbon in the compound? A) 83.2% B) 41.6% C) 16.8% D) 29.4% E) 15.7%

83.2%

A gas occupies 42.6 L at 2.00 atm pressure and 27°C. Calculate its volume if the pressure decreased to 1.00 atm at constant temperature? A) 21.3 L B) 85.2 L C) 128 L D) 28.5 L E) 179 L

85.2 L

When the following equation is balanced using the smallest possible integers, what is the number in front of the substance is bold text? Al + Fe₃O₄ →Al₂O₃ + *Fe* A) 1 B) 3 C) 6 D) 9 E) 12

9

Calculate the moles of 23.7 moles of He. A) 94.9 B) 27.7 C) 3.43 x 10²⁵ D) 5.92 E) 6.02 x 10²³

94.9

The charge on a strontium ion is? A) +2 B) +1 C) +3 D) -2 E) various charge are possible

A

The chemical formula Al₂O₃ indicates? A) two atoms of aluminum and three atoms of oxygen B) three atoms of aluminum and two atoms of oxygen C) six atoms of each element D) five atoms of each element E) none of these is correct

A

The correct name for the Al³⁺ species is? A) aluminum ion B) aluminum (III) ion C) aluminum D) trialuminum ion E) aluminum (3A) ion

A

The total number of Oxygen atoms indicated by the formula Cu₃(PO₄)₂ is? A) 8 B) 4 C) 12 D) 16 E) 11

A

The total number of atoms represented by the formula Co₃(PO4)₂ is? A) 13 B) 11 C) 8 D) 17 E) 6

A

Which of the following elements in an alkali metal? A) Na B) Sc C) Co D) Au E) Sr

A

Which of the following formulas in is incorrect? A) AlO3 B) KBr C)KNO₃ D) Li₂O?

A

Which of the following is a noble gas? A) Ar B) N₂ C) H₂ D) O₂ E) CO₂

A

Which of the following is an alkaline earth metal? A) Ra B) Au C) Gd D) Bi E) Cs

A

The correct formula for silver iodide? A) AgI B) AgI₂ C) Ag₂I D) SI E) SI₂

AgI

The correct name for FeO is? A) iron oxide B) Iron (II) oxide C) Iron III oxide D) iron monoxide E) iron oxide

B

The symbol for the element boron is? A) Bn B) Be C) Bor D) Bm E) B

B

What is the correct formula for barium hydroxide? A) Ba₂OH B) Ba(OH)₂ C) BaOH D) Ba(OH)₃ E) Ba(OH)₄

Ba(OH)₂

An aqueous solution of ammonium sulfate is allowed to react with an aqueous solution of nickel(II) chloride. Identify the solid in the equation. A) BaSO₄ B) (NH₄)₂SO₄ C) Ba(NO₃)₂ D) NH₄NO₃

BaSO₄

Which of the following processes require(s) chemical methods? A) At least two of the above require chemical methods. B) Breaking a compound into its constituent elements. C) Distilling a saltwater mixture D) Separating a heterogeneous mixture into pure substances. E) Separating a homogeneous mixture into pure substances.

Breaking a compound into its constituent elements.

Which of the following is a non-metal? A) cerium B) cesium C) carbon D) calcium E) copper

C

A compound contains 40.0% carbon, 6.7% hydrogen, and 53.3% oxygen (by mass). Calculate the empirical formula? A) CH₂O B) C₂H₂O C) CH₄O D) CH₄O E) C₂HO₂

CH₂O

The correct formula for carbon monoxide is? A) CO₂ B) CO C) C₂O D) CMnO₂ E) CH₄

CO

The empirical formula for the compound H₂C₂O₄ is? A) COH B) COH₂ C) C₂H₂ D) C₂O₄H₂ E) CO₂H

CO₂H

The correct formula for the carbonate ion is? A) CO₃⁻ B) CO₃²⁻ C) CO₄⁻ D) CO₄²⁻ E) CO₃³⁻

CO₃²⁻

Which of the following is not a step in the scientific method? A) Formulate a hypothesis B) Change results to agree with your hypothesis C) Make an observation D) Perform an experiment E) Develop a theory (or model)

Change your results to agree with your hypotehsis

What is the formula for cobalt(II) chloride? A) CCl B) CoCl C) Co₂Cl D) C₂Cl E) CoCl₂

Cobalt chloride

The empirical formula formula for a compound is C₂H₅O, and its mass is 361 amu. Calculate its molecular formula. A) C₁₆H₄₀O₈ B) C₃H₈O₂ C) C₄H₁₀O₂ D) C₇H₁₈O₄ E) C₆H₁₅O₃

C₁₆H₄₀O₈

Choose the pair of compounds with the same empirical formula? A) C₂H₂ and C₆H₆ B) NaHCO₃ and Na₂CO₃ C) K₂CrO₄ and K₂CrO₇ D) H₂O and H₂O₂

C₂H₂ and C₆H₆

The empirical formula for acetic acid is CH₂O. Its molar mass is 60 g/mol. The molecular formula is? A) CH₂O B) C₂H₄O₂ C) C₂H₆O D) C₂HO₂ E) none of the above

C₂H₄O₂

A gaseous compound containing carbon and hydrogen was analyzed and found to consist of 83.65 carbon by mass. What is the emperical formula of the compound? A) CH₂ B) Ch₃ C) C₇H₁₆ D) CH E) C₃H₇

C₃H₇

The correct name of LiCl is? A) lithium monochloride B) Lithium(I) chloride C) monolithium chloride D) lithium chloride E) monolithium monochloride

D

The correct name of P₂O₅? A) phosphorous (II) oxide B) phosphorous (V) oxide? C) diphosphorous oxide D) diphosphorous pentoxide E) phosphorous pentoxide

D

Titanium (IV) oxide has the formula? A) Ti₄O B) TiO₄ C) Ti(IV)O D) TiO₂ E) Ti₄O₂

D

Which of the following is a binary compound? A) O₂ B) HCN C) H₂SO₄ D) H₂S E) NaOH

D

How many of the following Dalton not discuss in his atomic theory? (isotopes, ions, protons, neutrons, electrons) A) 1 B) 2 C) 3 D) 4 E) 5

E

The symbol for rubidium ion is? A) Rb²⁺ B) R⁺ C) R²⁺ D) Ru E) Rb⁺

E

Which of the following elements is most similar to chlorine? A) H B) He C) Na D) Hg E) Br

E

True or false? The solution N₂ + 3H₂→2NH₃ means that 1 g of N₂ to form 2 g of NH₃.

False

The correct formula for iron(III) phosphide is? A) Fe₃P₂ B) FeP C) Fe₃P D) FeP₃ E) Fe₂P₃

FeP

The correct formula iron(II) phosphide is? A) Fe₂P₃ B) FeP C) Fe₂P D) Fe₃P₂ E) FeP₂

Fe₃P₂

Which of the following describes a chemical property of gold? A) Gold is a very dense metal B) Gold is a very soft metal C) Gold is inert (non-reactive) metal D) Gold is a yellow metal E) Gold is a good conductor of heat and electricity.

Gold is very inert (non-reactive) metal

Which of these is a chemical property? A) Sodium is a shiny soft metal. B) Ice melts at 0°C C) Glycerol is a viscous liquid D) Water has a high specific heat E) Helium is very nonreactive

Helium is very nonreactive

Which of the following statements about chemical reactions is *false*? A) In balancing a chemical equation, all subscripts must be conserved B) When one coefficient is doubled, he rest of the coefficients in a balanced equation must also be doubled C) The subscripts in a balanced equation tell us the number of atoms in a molecule. D) An individual coefficient in an equation is meaningless. E) The phases in a chemical reaction tell us the nature of reactions and products

In balancing a chemical equation, all subscripts must be conserved

The correct formula for potassium carbonate is? A) P₂CO₃ B) PCO₃ C) K₂CO₃ D) KCO₃ E) K(CO₃)₂

K₂CO₃

What is the correct formula for lithium phosphate? A) LPO₃ B) LiPO₄ C) Li₃PO₄ D) LP₄ E) Li(PO₄)₃

Li₃PO₄

Which of the following compounds is the product of the reaction Mg + O₂ A) MgO B) MgO₂ C) MgO₃ D) Mg₂O E) Mg₂O₃

MgO

Which of the following compounds contains an ionic bond? A) HCl B) NaCl C) CCl₄ D) SO₂ E) O₂

NaCl

The carbonate ion has the formula CO₃²⁻? What is the correct formula for sodium carbonate? A) NA(CO₃)₂ B) Na₂(CO₃)₂ C) Na₂CO₃ D) Na₃(CO)₂ E) NaCO₃

Na₂CO₃

The correct formula for sodium sulfide is? A) Na₂S B) NaS₂ C) NaS D) Na₃ E) SSu

Na₂S

An aqueous solution of ammonium sulfate is allowed to react with an aqueous solution of nickel (II) chloride. Identify the solid in the balanced equation? A) NiCO₃ B) NH₄Cl C) NiCl₂ D) (NH₄)₂CO₃ E) There is no solid formed when the solutions are mixed

NiCO₃

The formula for nickel (III) phosphate is? A) NiPO₄ B) Ni₃(PO₄)₂ C) NiPO₄ D) NiPO₄ E) Ni₂PO₃

NiPO₄

Water has a density of 1.0 g.mL. Which of these objects will float in water? Object I: mass= 50.0 g; volume = 69.4 mL Object II: mass=60.9g; volume =54.7 mL Object III: mass= 100.0 g; volume =40.0 mL A) II only B) I, III C) II, III D) III only E) I only

Object 1 only

An atom with 15 protons and 16 electrons is an atom of? A) S B) Ga C) P D) Rh E) Pd

P

The correct formula for Lead(IV) nitrate is? A) Pb(NO₃)₂ B) Pb(NO₃)₄ C) Pb₄NO₃ D) Pb₂(NO₃)₄ E) PbNO₃

Pb(NO₃)₄

The correct formula for lead(II) sulfite is? A) PbSO₃ B) PbSO₄ C) LSO₄ D) L₂SO₄ E) Pb₂SO₃

PbSO₃

Write the name for K.

Potassium

What is the formula for platinum(II) oxide? A) PO B) PO₂ C) P₂O D) PtO₂ E) PtO

PtO

The name for NaHCO₃ is? A) sodium hydrogen carbonate (sodium bicarbonate) B) sodium carbonate C) sodium(I) hydrogen carbonate D) sodium(I) bicarbonate E) none of these

Sodium hydrogen carbonate (sodium bicarbonate)

The name for Na₃N is? A) sodium nitride B) trisodium nitride C) sodium (I) nitride D) sodium (III) nitride E) trisodium mononitride

Sodium nitride

Which of the following statements is not true of balancing a chemical equation? A) Subscripts in the reactants must be conversed in the products B) Coefficients are used to balance the atoms on both sides C) The law of conservation of matter must be followed D) The phases in a chemical reaction tell us the nature of the reactants and products E) All of the above statements (a-d) are true.

Subscripts in the reactants must be conversed in the products

All of the following are clues that a chemical reaction has taken place except? A) A color changes B) A solid forms C) The reactant is smaller D) Bubbles form E) A flame occurs

The reactant is smaller

An aqueous solution of potassium chloride is mixed with an aqueous solution of sodium nitrate. Identify the solid in the balanced equation. A) KCl B) NaNO₃ C) KNO₃ D) NaCl E) There is no solid formed when the the two solutions are mixed.

There is no solid formed when the the two solutions are mixed.

The correct formula for titanium(II) oxide is? A) Ti₂O B) TiO₂ C) TO D) TO₂ E) TiO

TiO

True or false? The normal boiling point of water is 100 degrees celsius, which is a physical property of the substance water.

True

Which of the following statements is not true? A) When a metal reacts with a nonmetal, an ionic compound is formed B) A metal-nonmetal reaction can always be assumed to be oxidation-reduction C) two nonmetals can undergo an oxidation-reduction reaction D) When two nonmetals react, the compound formed is ionic E) A metal nonmetal reaction involves electron transfer

When two nonmetals react, the compound formed is ionic

The symbol for the element zinc is? A) Z B) Zi C) Zin D) Zc E) Zn

Zn

Water is an example of ______? A) a homogeneous mixture B) a heterogenous mixture C) an element D) a compound

a compound

The factors that most commonly cause chemical reactions except? A) formation of a solid B) formation of a gas C) formation of water D) transfer of electrons E) a decrease in temperature

a decrease in temperature

A homogenous mixture is also called? A) a heterogeneous mixture B) a pure substance C) a compound D) an element E) a solution

a solution

A substance that, when dissolved in water produces a solution that conducts an electric current is? A) A strong electrolyte B) a weak electrolyte C) a strong ion D) an electrical solute E) none of these

a strong electrolyte

A solution with a pH of 2.17 is? A) basic B) acidic C) neutral

acidic

The name for Al(OH)₃ is? A) aluminum (III) hydroxide B) aluminum trihydroxide C) aluminum hydroxide D) monaluminum trihydroxide E) aluminium(I) hydroxide

aluminum hydroxide

The name for NH₄Br is? A) nitrogen hydrogen bromide B) ammonium bromide C) ammonium(I) bromide D) nitrogen tetrahydrogen bromide E) none of these

ammonium bromide

Helium is an example of? A) a heterogeneous mixture B) an element C) a homogeneous mixture D) a compound

an element

When a precipitation reaction occurs, the ions that do not form the precipitate _______ A) evaporate B) are cations only C) form a second insoluble compound in the solution D) are left dissolved in the solution E) none of these

are left dissolved in the solution

The name for Ba(NO₃)₂ is? A) barium dinitrate B) barium(II) nitrate C) barium nitrite D) barium(I) nitrate E) barium nitrate

barium nitrate

Which of the following involves no chemical change? A) lighting a match B) boiling water C) baking a cake D) burning paper E) driving a car

boiling water

Which of the following is a nonmetal? A) cesium B) copper C) cerium D) calcium E) carbon

carbon

Which of the following involves a chemical change? A) cooking an egg B) none of these C) boiling water D) chopping wood E) melting ice

cooking an egg

What term is used by chemists to quantitatively describe a solution in which a relatively small amount of solute is dissolved? A) dilute B) saturated C) supersaturated D) concentrated E) unsaturated

dilute

Which particle has the smallest mass? A) helium nucleus B) proton C) neutron D) electron

electron

Which of the following is a physical change? A) evaporating water B) decomposing meat C) burning gasoline D) rusting iron E) cooking an egg

evaporating water

True of false? Mendeleev is credited with the modern atomic theory of atoms?

false

True or false? A balanced chemical equation is one with the same number of moles of molecules on each side of the equation.

false

True or false? A compound can consist of one kind of element.

false

True or false? A solid substance is not considered matter.

false

True or false? CH₄ has ionic bonds.

false

True or false? Covalent bonding occurs when a metal reacts with a nonmetal.

false

True or false? Gold is relatively soft metal, which is a chemical property of the substance gold.

false

True or false? The empirical formula and the molecular formula for a compound cannot be the same.

false

The state of matter of an object that has neither definite shape nor volume is? A) liquid B) mixed C) solid D) gaseous E) elemental

gaseous

Which of the following is an element? A) salt B) vinegar C) helium D) alcohol E) sugar

helium

A __________is a summary of observed behavior and a _________ is an explanation of behavior? A) law, theory B) hypothesis, theory C) theory, law D) theory, scientific method

law, theory

The state of matter for an object that has a definite volume but not a definite shape is? A) solid B) mixed C) elemental D) gaseous E) liquid

liquid

The name for MnBr₂? A) manganese(II) bromide B) manganese(I) bromide C) magnesium bromide D) manganese bromide E) manganese(III) bromide

manganese(II) bromide

The fundamental unit of length in the metric system is the...? A) gram B) centimeter C) meter D) millimeter E) kilometer

meter

The correct name for NiO? A) nickel(II) oxide B) nickel(I) oxide C) nickel oxide D) nickel monoxide E) nickel(I) monoxide

nickel(II) oxide

A mixture of sand and water is a(n) _____________? A) solution B) solvent C) solute D) aqueous solution E) none of these

none of these

In chemistry a formula is used to represent? A) compound B) an element C) a metal D) all of these E) none of these

none of these

The binary compound PCl₃ is called? A) phosphorous chloride B) triphosphorous chloride C) monophosphorous D) phosphorous trichloride E) none of these

phosphorous trichloride

Density is an example of a ______? A) physical change B) chemical change C) qualitative property D) physical property E) chemical property

physical property

The balanced P₄(s) + 6H(g)→ 4PH₃(g) tells us that 5.0 mol H₂? A) reacts with 4.0 mol O₂ B) produces 10.0 mol PH₃ C) cannot react with phosphorous D) produces 3.3 mol PH₃ E) reacts with 5.0 mol P₄

produces 3.3 mol PH₃

The balanced equation 2cu(s) + O₂(g)→2CuO(s) tells us that 4.0 mol of Cu? A) reacts with 4.0 mol of O₂ B) produces 4.0 mol of CuO C) must react with 128 g of O₂ D) cannot react with oxygen E) produces 8.0 mol CuO

produces 4.0 mol of CuO

The state of matter for an object that has both definite volume and definite shape is? A) gaseous B) elemental C) liquid D) mixed E) solid

solid

In a soda pop, CO₂(g) is a ___________, and water is the ___________. A) solute; solvent B) solvent; solute C) solution; solute D) solute; solution E) solvent; solution

solute; solvent

The name for SrCl₂ is? A) strontium dichloride B) strontium(I) chloride C) strontium(II) chloride D) strontium chloride E) strontium(I) chloride(II)

strontium chloride

Which of the following is only a physical change? A) a banana ripens B) leaves turn colors in the fall C) cookies burn in the oven D) at least two of the above (a-d) exhibit only a physical change E) sugar dissolves in coffee

sugar dissolves in coffee

An example of a mixture is? A) all of these B) the air in this room C) gold D) purified water E) hydrogen fluoride

the air in this room

In a chemical change, A) a phase change must never occur. B) a phase change never occurs C) the original material can never be regenerated D) the products are different substances from the starting materials

the products are different than the starting materials

True or false? A bond is a force that holds a group of two or more atoms together and makes them function as a unit.

true

True or false? Approximately 38 g of NaCl can be dissolved in 100 g of water at 25°C is unsaturated.

true

True or false? Covalent bonding occurs when electrons are shared by nuclei.

true

True or false? In naming Ionic compounds, the cation is named first and the anion second.

true

True or false? Metal rusting is an example of a chemical change.

true

True or false? N₂ is an example of a covalent bond.

true

True or false? The equation N₂(g) + 3H₂(g) →2NH₃(g) can be interpreted by saying 1 mol of N₂ reacts with 3 mol of H₂ to form 2 mol NH₃.

true

True or false? The formula of a compound that expresses the smallest whole-number ratio of atoms present is called the empirical formula?

true

The chemical Al₂O₃ indicates? A) six atoms of each element B) five atoms of each element C) three atoms of aluminum and two atoms of oxygen D) two atoms of aluminum and three atoms of oxygen E) none of these

two atoms of aluminum and three atoms of oxygen

Which of these are isotopes of Hydrogen? A) ¹²C and ¹³C B) ²H and He C) Li⁺ and He D) ³H and ²H E) ⁴²K and ⁴⁰K

³H and ²H