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Q3 Final Review

Total questions: 40

Worksheet time: 1hrs 11mins

Name
Class
Date
1.
Theoretical yield = 73g
Actual yield = 62g
Calculate the percent yield.
a)
1.16%
b)
116%
c)
85%
d)
76%
2.
P4 + 3O2 --> P4O6 
What is the limiting reactant is 12 moles of P4 react with 15 moles of O2?
a)
P4
b)
O2
c)
P4O6 
d)
none of the above
3.

CH4 + 2O2 --> 2H2O + CO2

What is the volume of CO2 produced when 16g of O2 reacts?

a)

1.09 L

b)

5.6 L

c)

11.2 L

d)

45.7 L

4.
In order to convert to Kelvin, you add ______ to the Celsius measurement.
a)
372
b)
273
c)
237
d)
732
5.
If a balloon is cooled what will happen to the volume?
a)
Volume will increase
b)
Volume will decrease
c)
Volume will not change
6.
Directly proportional means that as one value increases ....................
a)
the other stays the same 
b)
the other increases as well
c)
the other decereases
d)
the other goes to zero
7.
What is the correct formula for Boyle's Law?
a)
V1/T1=V2/T2
b)
P1V1=P2V2
c)
P1/T1=P2/T2
d)
PV=nRT
8.
A sample of a gas has a volume of 852 mL at 298 K. What temperature is necessary for the gas to have a volume of 945 mL?
a)
Pt = P1 + P2 + P3 + ...
b)
P1V1 = P2V2
c)
V1/T1 = V2/T2
d)
P1V1/T1 = P2V2/T2
9.
A container is filled with H2, and H2O. What is the partial pressure of H2 when the pressure of water is 17 kPa. The total pressure of the gases is 750 kPa.
a)
P1V1 = P2V2
b)
Pt = P1 + P2 + P3 +...
c)
P1/T1 = P2/T2
d)
V1/n1 = V2/ n2
10.
If a chemist calculates the maximum amount of product that could be obtained in a chemical reaction, he or she is calculating the
a)
theoretical yield
b)
mole ratio
c)
actual yield
d)
percentage yield
11.
Mole ratios are obtained from the
a)
balanced chemical equation
b)
periodic table
c)
molar mass
12.
What is the mole ratio of H2O to H3PO4 in the following chemical equation?   P4O10 + 6 H2O --> 4 H3PO4 
a)
6:4
b)
4:6
c)
1:3
d)
3:1
13.
2Al + 3H2SO4 -> Al2(SO4)3 + 3H2
How many grams of aluminum sulfate would be formed if 250g H2SO4 completely reacted with aluminum?
a)
0.85 g
b)
290 g
c)
450 g
d)
870 g
14.
Using the following equation:
Fe2O3(s) + 3H2(g) → 2Fe(s) + 3H2O(l)
How many moles of iron can be made from  6 moles H2? 
a)
4 moles Fe
b)
6 moles Fe
c)
9 moles Fe
d)
2 moles Fe
15.

According to the kinetic molecular theory, which statement describes the particles in a sample of an ideal gas?

a)

The particles have attractive forces between them.

b)

The particles are considered to have negligible volume.

c)

The particles are constantly moving in circular paths.

d)

The particles collide, decreasing the total energy of the system.

16.

A sample of a gas in a rigid cylinder with a movable piston has a volume of 11.2 liters at STP. What is the volume of this gas at 202.6 kPa and 300. K?

a)

22.4 L

b)

5.10 L

c)

24.6 L

d)

6.15 L

17.

Which phrase describes the motion and attractive forces of ideal gas particles?

a)

random curved-line motion and no attractive forces

b)

random straight-line motion and strong attractive forces

c)

random straight-line motion and no attractive forces

d)

random curved-line motion and strong attractive forces

18.

Which graph best represents the pressure-volume relationship for an ideal gas at constant temperature?

a)
b)
c)
d)
19.

At approximately what temperature does the solubility of sodium chloride, NaCl, match the solubility of potassium dichromate, K2Cr2O7?

a)

60oC

b)

30oC

c)

50oC

d)

83oC

20.

When 42 grams of potassium chloride, KCl, is dissolved in 100 grams of water at 50oC, the solution can be correctly described as:

a)

supersaturated

b)

saturated

c)

unsaturated

21.

Which solute does not increase in solubility as the temperature increase?

a)

NaCl

b)

SO2

c)

KClO3

d)

KNO3

22.

You can make a solute dissolve more quickly in a solvent by

a)

adding more solute

b)

adding ice

c)

heating the solvent

d)

removing some solvent

23.

Why does stirring a solute increase the rate of dissolving?

a)

It increases the amount of fresh solute that interacts with the solvent

b)

It decreases the amount of fresh solute that interacts with the solvent

c)

it increases the gravitational force between the particles

d)

it increases the strong force between the particles

24.

Why does increasing the temperature of a solution increase the rate of dissolving?

a)

it increases the kinetic energy of the particles and causes more interaction between the solute and solvent

b)

it increases the potential energy of the particles and causes more interaction between the solute and solvent

c)

it decreases the kinetic energy of the particles and causes more interaction between the solute and solvent

d)

it decreases the potential energy of the particles and causes more interaction between the solute and solvent

25.

Which change will have the least effect on the solubility of a solid?

a)

increase in temperature

b)

increase in surface area

c)

decrease in temperature

d)

decrease in pressure

26.

Which of the following pairs of solutions produces a precipitate when combined?

a)

Cu(NO3)2 and NaCl

b)

Fe(NO3)3 and MgCl2

c)

Cu(NO3)2 and K2CO3

d)

CaCl2 and NaNO3

27.

When solutions of MgCO3 and Fe2(SO4)3 are combined, what precipitate(s) forms?

a)

MgSO4

b)

neither form a precipitate

c)

MgSO4 and Fe2(CO3)3

d)

Fe2(CO3)3

28.
Zinc Hydroxide
a)
Soluble 
b)
Insoluble
29.

What is the molarity of a 0.5L sample of a solution that contains 60.0 g of sodium hydroxide (NaOH)

a)

0.8 M

b)

1.5M

c)

3.0M

d)

6.0M

30.

Which of the following is the correct formula for calculating molarity?

a)

moles/liters of solution

b)

moles/kg of solvent

c)

# particles/Avogadro's #

d)

theoretical yield/actual yield

31.

Which of the following types of solutions has more room to dissolve solute?

a)

supersaturated

b)

saturated

c)

unsaturated

32.

What is the molality of a solution in which 3.0 moles of NaCl is dissolved in 1.5 Kg of water?

a)

2.0 M

b)

0.22 m

c)

135 m

d)

2.0m

33.

Electrolytes

a)

don't conduct electricity

b)

conduct electricity

34.

Since "like dissolves like", water and oil will not mix because

a)

both of them are polar

b)

both of them are nonpolar

c)

oil is polar and water is nonpolar

d)

oil is nonpolar and water is polar

35.
How many moles are needed to make 2.5 L of a 3.8 M solution? 
a)
9.5 mol
b)
0.66 mol
c)
1.5 mol
d)
15 mol
36.

Attractions between the negative Oxygen atom of one water molecule and the positive Hydrogen atom of another water molecule are called

a)

Covalent bonds

b)

Ionic bonds

c)

Hydrogen bonds

d)

Polar bonds

37.
A water molecule is polar. Its bent shape results in the following...
a)
slightly positive charge on hydrogen and slightly negative charge on oxygen
b)
slightly positive charge on hydrogen and slightly  positive charge on oxygen
c)
slightly negative charge on hydrogen and slightly positive charge on oxygen
d)
no change because its neutral
38.

What type of compounds is water able to dissolve?

a)

ionic and polar covalent compounds.

b)

polar covalent and nonpolar covalent compounds.

c)

polar covalent compounds only.

d)

ionic compounds only.

39.

What would the molarity of a solution be if you took 10 mL of a 13M stock solution and made a 300 mL solution?

a)

390M

b)

230M

c)

0.43M

d)

0.26M

40.

Which of the following is the Dilution Formula?

a)

V1M1 = V2M2

b)

M = m/V

c)

V = mT

d)

PV = nRT

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