Chem 107 Final Butler missing quiz 1&2 and exam 1

sublimation

(chemistry) a change directly from the solid to the gaseous state without becoming liquid

A balloon contains 0.29 moles Ar with a volume of 3.8 L under certain conditions. What volume will the balloon have if gas is added so that the balloon now contains a total of 0.86 mol Ar under the same conditions? A)11 L B)0.0089 L C)1.3 L D)3.8 L E)8.6 L

A

A sample of gas initially has a volume of 859 mL at 292C and 3.90 atm. What pressure will the sample have if the volume changes to 268 mL while the temperature is increased to 542C? A)18.0 atm B)8.67 atm C)23.2 atm D)10.2 atm E)0.0431 atm

A

At 0 K, all molecular motion stops A)True B)False

A

The force of gas particles against the walls of a container is called A)pressure B)volume C)temperature D)quantity of gas E)density

A

The reaction AB--> A + B is an example of A)decomposition reaction B)combination reaction C)single replacement reaction D)double replacement rxn

A

an alloy, such as brass is an example of a solution in the solid state A)true B)false

A

gas densities are most often expressed as units of g/L? A)true B)false

A

in the ideal gas law, assuming that n designates moles and T designates Kelvin degrees, the value of R depends on the units that are chosen to express volume and pressure A)true B)false

A

what experimental quantity measures force per unit area? A)pressure B)volume C)temperature D)quantity of gas E)density

A

what is the correct formula for the oxide ion? A)O2- B)O- C)O+ D)O2+ E)O3+

A

covalent bond

A chemical bond that involves sharing a pair of electrons between atoms in a molecule

heterogeneous mixture

A mixture in which different materials can be distinguished easily

homogeneous mixture

A mixture in which substances are evenly distributed throughout the mixture

chemical reaction

A process during which chemical bonds between atoms are broken and new ones are formed. Producing one or more different substances.

acid-base reaction

A special type of double replacement rxn in which water and a salt are produced (HY + XOH --> H2O + XY)

compound

A substance made up of atoms of two or more different elements joined by chemical bonds

volume

Amount of space occupied by a fluid

A gas sample is prepared in which the components have the following partial pressures: nitrogen 555mmHg; oxygen 149mmHg; water vapor 13mmHg; argon 7 mmHg, what is the total pressure of this mixture? A)760 mmHg B)1480 mmHg C)386 mmHg D)724 mmHg E)614 mmHg

D

States that if a stress is applied to a system at equilibrium, the system shifts in the direction that relieves the stress?

Le Chatelier's Principle

freezing

Liquid to a solid

evaporation

Liquid to gas

D =

Mass/Volume

polar

Molecule with partial charges. Mixes with water.

unsaturated

More solute can be dissolved

Centi

One hundredth

Mega

One million

Deci

One tenth

Kilo

One thousand

Milli

One thousandth

combined gas law

P1V1/T1= P2V2/T2

chemical change example

bleaching, rust, frying an egg, heat

Negative electrode

cathode

The particle formed when a base gains a hydrogen ion?

conjugate acid

the gradual wearing away of a metal element due to a chemical reaction

corrosion

A process by which an electric current breaks chemical bonds.

electrolysis

Keq=[products]/[reactants], only use (g) and (aq) in equilibrium solution.

equilibrium formula

physical change example

melting, shredding paper, mixing sand and water

van der waals forces

slight attraction that develops between oppositely charged regions of nearby molecules

In order to draw the Lewis dot structure for CCl4, how many valence electrons do you need to find a place for? A)4 B)8 C)28 D)32 E)57

D

Occurs when there is only 2 elements, Add -ide to end second element?

Binary

hydrogen bonding

Bonds between hydrogen atom and oxygen atom of another water molecule

1 gram

5 carats

1 atm=

760 mm Hg

A patients systolic pressure is measured as 128 mm Hg what is the pressure in atm? A)128 atm B)1.28 atm C)0.168 atm D)9.73 x 10^4 atm E)8.71 atm

C

0.300 moles of lithium has a mass of? A)1.39 g B)2.08 g C)6.00 g D)23.1 g E)1.40 g

B

Gas law calculations normally require the use of the Fahrenheit temperature scale A)True B)False

B

One mole of particles of any substance contains how many particles? A)10^6 B)6.02x 10^23 C)3 x 10-10 D)3 x 10^10 E)6.02 x 10^-23

B

The conversion of a liquid directly into the gaseous state is an example of A)sublimation B)evaporation C)condensation D)freezing E)melting

B

The polyatomic ion(OH-) is named? A)oxyhydrogen ion B)hydroxide ion C)oxygen hydrogen ion D)hydrooxygen ion E)hydrogen oxygen ion

B

The temperature of a 500. mL sample of gas increases from 150. K to 350. K. What is the final volume of the sample of gas if pressure is kept constant? A)210. mL B)1170 mL C)0.00950 mL D)0.00474 mL E)110. mL

B

What is the correct formula for the Colbalt (II) ion? A)Co+ B)Co2+ C)Co3- D)Co2- E)Co3+

B

What is the major attractive force between water molecules ? A)london forces B)hydrogen bonding C)van der waals forces D)ionic bonding E)none of the above

B

When some of the sugar added to iced tea remains undissolved at the bottom of the glass the solution is A)dilute B)saturated C)unsaturated D)polar E)non-polar

B

an aerosol can has a pressure of 1.86 atm. What is this pressure in units of mm Hg? A)1.86 mmHg B)1410 mmHg C)1860mmHg D)0.00245 mmHg E)760 mmHg

B

at STP, 1 mole of a ideal gas has a volume of 42.2 mL A)true B)false

B

how many molecules of water are present in 4.65 mole sample of water? A)7.75 x 10^-24 B)2.80 x 10^24 C)6.02 x 10^23 D)1.55 x 10^23 E)83.8 molecules

B

if you need to solve a problem using the combined gas law to solve for the final temp (T2) which of the following equations would you use to solve the equation for T2? A)T2= P1V1T1/P2V2 B)T2=P2V2T1/P1V1 C)T2=P1V2T1/P2V1 D)T2=P2V1T1/P1V2 E)T1=P1V1T2/P2V2

B

polar compounds generally have lower boiling points than non polar compounds of similar molecular weight. A)true B)false

B

what is the molar mass of sulfur dioxide? A)48.07 g/mol B)64.07 g/mol C)32.07 g/mol D)16.00 g/mol E)44.01 g/mol

B

At STP, temperature and pressure have the values of A)0 K and 1 atm B)273 K and 1 mm Hg C)0 C and 760 mm Hg D)0 K and 760 mm Hg E)760 K and 273 atm

C

Calculate the density of oxygen gas (O2) at STP, in g/L. [molar mass: O, 16.0 g/mol] A)0.714 g/L B)22.4 g/L C)1.43 g/L D)16.0 g/L E)717 g/L

C

In order to draw the Lewis dot structure for SO3^2-, how many valence electrons do you need to find a place for? A)6 B)24 C)26 D)30 E)32

C

To convert a given number of moles into the number of atoms, you would multiply by which of the following conversion factors? A)1 mol/6.02 x 10^23 atoms B)1.66 x 10^-23 atoms/ 1 mol C)6.02 x 10^23 atoms/ 1 mol D)1 mol/ 1.66 x 10^-24 atoms E)molar mass

C

What is the correct name of the compound HCl A)chloric acid B)chlorous acid C)hydrochloric acid D)hydrogen chlorate acid E)hydrogen monochloride acid

C

What is then formula of a compound that contains Al3+ and S2- ions? A)Al3S2 B)AlS C)Al2S3 D)Al3S3 E)Al3S4

C

Which of the following is the correct electron dot symbol for carbon A)2 on top and 2 on left B)1 on top 1 on left 2 on right C)one on each side D)2 on each side E)2 on top 1 on each side

C

Which of the following molecules has the largest London dispersion forces? A)CH4 B)C3H8 C)C8H18 D)N2F4 E)SO2

C

choose the best classification of the reaction? C3H8(g) + 5O2(g) --> 3CO2 (g) + 4H2O(l) A)acid -base B)precipitation C)combustion D)decomposition E)combination

C

Kelvin

C + 273

The formula of manganese (II) chloride is A)MnCl B)Mn2Cl C)MnCl3 D)MnCl2 E)Mn2Cl3

D

To which elements must hydrogen be bonded in order to display hydrogen bonding? A)fluorine B)oxygen C)nitrogen D)all of the choices are correct E)none of the choices are correct

D

What is the correct name of the compound Na2SO4? A)disodium sulfur tetroxide B)sodium sulfur oxide C)disodium sulfate D)sodium sulfate E)sodium sulfurite

D

a temperature of 257 C is the same as? A)-148 k B)398 K C)257 K D)530. K E)273 K

D

how many moles are in 38.4 grams of gold? A)7.56x10^3 mol B)5.13 mol C)5.08 x 10^-3 mol D)0.195 mol E)0.144 mol

D

which measurement describes the pressure of gas? A)315 k B)1.2 g/L C)2.5 L D)725 mm Hg E)0.45 moles

D

A measure of how much mass is contained in a given volume?

Density

How many moles of neon occupy a volume of 24.3 L at STP? A)0.638 moles B)544 moles C)0.922 moles D)6.35 moles E)1.08 moles

E

The number of electrons in the electron-dot symbol of oxygen is A)two B)three C)four D)five E)six

E

What volume will be occupied by 0.884 mol of gas at 0.978 atm and 9.00C? A)0.0478 L B)16.2 L C)1.50 L D)0.668 L E)20.9 L

E

which of the following observations would suggest that a chemical rxn has occurred in a solution? 1. the solution gets warm without heat being added by the experimenter 2. the color of the solution changes 3. the solution bursts into flames 4. the solution starts to bubble A)only #1 is suggestive of a chemical reaction B)only #2 is suggestive of a chemical reaction C)only #3 is suggestive of a chemical reaction D)only #4 is suggestive of a chemical reaction E)all of the changes are suggestive of a chemical reaction

E

ionic bond

Formed when one or more electrons are transferred from one atom to another

reduction

Gain of electrons

condensation

Gas to liquid

melting

Solid to liquid

STP

Standard Temperature and Pressure. 273 Kelvin (0 Celsius), 1 atmosphere (760 torr, 760 kPA).

electron dot symbol

The representation of an atom that shows valence electrons as dots around the element.

dilute

To make a liquid less concentrated

saturated

Unable to dissolve any more solute

precipitation reaction

When two clear solutions react to produce an insoluble solid.

physical reaction

a change in matter that does not affect its chemical composition

single replacement reaction

a chemical change in which one element replaces a second element in a compound

combination reaction

a chemical change in which two or more substances react to form a single new substance

double replacement reaction

a chemical reaction between two compounds where the positive ion of one compound is exchanged with the positive ion of another compound Reaction involving two ionic compounds where the positive ion from one compound combines with the negative ion of the other compound. The result it two new ionic compounds that have switches partners.

combustion reaction

a chemical reaction that occurs when a substance reacts with oxygen, releasing energy in the form of heat and light

non-polar

a molecule in which all atoms have the same electronegativity and the electron distribution is equal

decomposition reaction

a reaction in which a single compound breaks down to form two or more simpler substances

polyatomic ion

a tightly bound group of atoms that behaves as a unit and has a positive or negative charge

Positive electrode

anode

london forces

the weak attractive forces between molecules resulting from the small, instantaneous dipoles that occur because of the varying positions of the electrons during their motion about nuclei