second semester chemistry test

180 C =

453 K

5000 K =

4727 C

2NaCl --> 2Na + Cl2

decomposition

AgNO3 + NaCl --> AgCl + NaNO3

double replacement

What is a limiting reactant?

silver nitrate

Zn + H2SO4 --> ZnSO4 + H2

single replacement

CaO + H₂O → Ca(OH)₂

synthesis reaction

a sample of 2.67x10^25 molecules of carbon dioxide would have what mass

(B) 1.95x10^3 moles

What is the boiling point of water in degrees celsius

(B) 100

what volume of oxygen gas will be produced when 60 grams of potassium chlorate decompose

(B) 16.45 dm^3

a gas is kept in a fixed volume container and heated from 293 K to 500K. What will be the pressure at 500K is the pressure at 293 K is 101.3 kPa

(B) 172.87 kPa

the formula mass of C6H12O6 would be:

(B) 180.18

90 grams of NaNO3 is added to 100 grams of water at zero degrees Celsius. With constant stirring, to what temperature must the solution be raised to produce a saturated solution with no solid NaNO3

(B) 23 C

a 55.6 gram sample of water is cooled from 50 C to 35.5 C. How many joules of energy are released

(B) 3373.14 J

a sample of neon in a 5 L container has a pressure of 84.5 kPa. A sample of helium in a 3 L container has a pressure of 69.6 kPa. The neon is placed in the helium container. What is the total pressure

(B) 50.7 kPa

which one of the following types of solution could not be produced using aluminum acetate as the solute

(C) concentrated

the change in phase from a liquid to a gas is called

(C) evaporation

an increase in temperature decreases both the rate of dissolving and the amount that dissolves for most:

(C) gaseous solutes

the amount of heat absorbed by a substance as it changes from a solid to a liquid would be called:

(C) heat of fusion

lithium oxide and water react in a synthesis reaction. The products of this reaction would be

(C) lithium hydroxide

the quality of a substance that has a mass in grams equal to the molecular mass is known a:

(C) mole

the pressure exerted by one gas in a mixture of gases is called:

(C) partial pressure

the new substances formed in a chemical reaction are referred to as

(C) products

the salt that is dissolved in water to make a solution is called the:

(C) solute

60 g of SO2 is dissolved in 300 g of water at 70 C. Is this solution:

(C) supersaturated

the amount of a solid substance that dissolves in another substance is affected by all of the following except:

(C) the pressure

when one form of energy is converted to another from of energy:

(C) the total amount of energy remains the same

the formula for ammonium phosphate would be:

(D) (NH4)3PO4

How many moles of gold are present in a 295 gram sample of gold

(D) 1.5 mol

a saturated solution of KNO3 in 200 grams of water at 50 C is cooled to 20 C. How much KNO3 will precipitate out of solution

(D) 108

a mole is equal to each one of the following except:

(D) 4.2 J/g C

0.96 atm would be equal to how many Pascals

(D) 97, 248

Bromine + Sodium Iodide ->

(D) Br2 + 2Nal -> 2NaBr + I2

the commonly used definition of energy is the:

(D) ability to do work

a double replacement reaction between two ionic compounds in water solution will occur if:

(D) all of the above

the type of chemical equation in which one reactant produces several products would be:

(D) decomposition

calculate the relative rates of diffusion of Carbon dioxide gas and nitrogen gas

(D) nitrogen diffuses 1.25 times faster than carbon dioxide

a 165 dm^3 sample of a gas is at a pressure of 51.2 kPa and a temperature pf 295K. What volume does the same sample of gas occupy at 82 C and 103 kPa

(B) 93.7 dm^3

how much heat is released when 35 grams of steam at 112 C cools to 45 C

(B) 9811.48 J

in order for the following reaction to occur, which one of the following must be true 2Al + 6HCl -> 2AlCl3 + 3H2

(B) Al must be above H on the activity series

find the empirical formula of a compound with a percentage composition of 52.3% C, 13.0% H, and 34.7% O.

(B) C2H6O

In solids the motion of the molecules is:

(B) a vibration about fixed position

which reactant is in excess

(B) calcium chloride

the properties of a solutions include all of the following except:

(B) dissolved particles will settle out upon standing

a reaction that gives off heat as the reaction proceeds is called a(n)

(B) exothermic reaction

the heat required to change a unit of mass (one gram) of a liquid to a gas at a constant temperature

(B) heat of vaporation

Br2 + NaCl ->

(B) no

NaCl + KBr --->

(B) no

the amount of heat it takes to raise the temperature of one gram of any substance by one degree Celsius is:

(B) specific heat

a chemical formula gives all of the following information except:

(B) the mass of each element present in the compound

what would happen to the volume of a gas if the pressure on that gas is increased

(B) the volume would decrease

an equation is considered balanced when:

(B) there is the same number of atoms on both sides of the equation

what is the specific heat of a substance that absorbs 2500 Joules of heat when a sample of 10,000 grams of the substance increases its temperature from 20 C to 70 C

(C) .005 J/g C

what is the molarity of a solution that is prepared by dissolving 5 grams of CaSO4 in .5 kg of water

(C) .074m

a sample of oxygen gas has a volume of 205 cm^3 when its temperature is 22 C and its pressure is 30.8 kPa. id the density of the gas as STP is 1.43 g/dm^3, what is the mass of the sample

(C) .082 g

how many moles of sodium are contained in a sample of 36 grams of NaCl

(C) .62 mol

all of the following are standard pressures except:

(C) 100 kPa

convert 840 mm Hg to KPa

(C) 111.96 kPa

what is the freezing point of water in Kelvins

(C) 273 K

the reactant in excess is in excess by how much

(C) 38.57 g

what volume will 1.20x10^25 molecules of NO2occupy a STP

(C) 446.51 dm^3

what mass of NaCl would decompose to yield 355 grams of chloride

(C) 585.2g

which one of the following would be correctly balanced for this equation? Ca(OH)2 + (NH4)2SO4 -> NH3 + CaSO4 +H2O

(C) Ca(OH)2 + (NH4)2SO4 -> 2Nh3 + CaSO4 + 2H2O

the formula for mercury (II) nitrate would be:

(C) Hg(NO3)2

the SI (metric) unit for measuring energy is the:

(C) Joule

Lead (II) sulfate is precipitated from a mixture of water solutions of potassium sulfate and leaf (II) nitrate. What are the reactants in this reaction

(C) K2SO4 and Pb(NO3)2

on a graph showing a heating curve a straight line plateau would represent:

(C) a phase change

Zn + CuSO4 ->

(A) yes

.005 moles of HNO3 would contain how many moles of oxygen

(B) .015 mol

as the temperature of a gas increases, the volume increases. This is called:

(C) charles law

what amount of heat would have to be given off by 3000 grams of water in order to lower its temperature from 95 C to 15 C

(B) 1.008x10^6 J

what is the molarity of a solution that contains 5.85 g of NaCl in .5 dm^3 of water solution

(A) .2M

what is the freezing point of water in degrees Celsius

(A) 0

how many molecules of silver chloride are produced

(A) 1.2x10^23

given the following reaction: 4H2O + 3Fe -> Fe3O4 + 4H2 how many grams of iron oxide will be produced if 112 grams of iron reacts completely with water

(A) 154.78 g

the heat of fusion of ice at 0 C is 3.4x10^2 J/g. How much heat energy is absorbed by 6.2v10^2 g of ice as it melts at 0 C

(A) 2.108x10^5 J

How many atoms of aluminum would be forund in 100 grams of aluminum

(A) 2.23x10^24

calcium hydroxide reacts with sulfuric acid in a double displacement reaction. How many grams of calcium hydroxide will react with 29.4 grams of sulfuric acid.

(A) 22.2g

a sample of a gas under pressure of 822 kPa has a volume of 312 cm ^3. the pressure is increased to 948 kPa. what volume will the gas occupy at the new pressure, assuming a constant temperature

(A) 270.53 cm^3

use the ideal gas law to find the volume occupied by 68 grams of hydrogen sulfide (H2S) at STP

(A) 44.57 dm^3

the pressure of the atmosphere at sea level will support a column of mercury that is:

(A) 760 mm in height

potassium sulfide + nitric acid -> potassium nitrate + hydrogen sulfide

(A) K2S + 2HNO3 -> 2KNO3 + H2S

a temperature scale that uses absolute zero as its starting point is the:

(A) Kelvin scale

Mg3(PO4)2 would be named :

(A) Magnesium phosphate

calcium carbonate would decompose to form what

(A) calcium oxide and carbon dioxide

a formula that has been reduced to its lowest terms is called:

(A) empirical formula

in a chemical reaction the total mass of the substances before the reaction compared to the total mass of the substances after the reaction is

(A) equal

as the temperature decreases, the density of a gas would

(A) increase

solvents consisting of polar molecules are more effective in dissolving solutes that are made up of:

(A) polar molecules

the rate of solution of a particular substance is affected by:

(A) stirring

in a mixture of total gases the total pressure of the gases is equal to the:

(A) sum of the pressures of the individual gases

which of the following results in a single product

(A) synthesis reaction

what is the term for the temperature at which a substance changes phase from liquid to a solid

(A) the freezing point

if a gas is confined in a rigid container and then heated, what will happen to the pressure exerted by that gas

(A) the pressure would increase

gases can be compressed by increasing the pressure, but liquids can be only very slightly compressed. This is because:

(A) there is less space between the particles in a liquid than a gas

NaOH + H3PO4 ->

(A) yes

540 K =

267 C

23 C =

296 K

what is the percentage composition of C6H12O6

39.97% C, 6.73% H, 53.28% O