Free Printable Chemistry Spring Final Review

1.

What is the molar mass (NH₄)₂CO₃?

a)

43.03 g/mol

b)

78.06 g/mol

c)

94.09 g/mol

d)

96.11 g/mol

2.

What is Avogadro's Number?

a)

6.02 x 10²³

b)

- 6.02 10²³

c)

6.02 x 10²²

d)

6,020,000,000,000

3.

For the Balanced Reaction: 3 Mg + 1 Fe₂O₃ → 3 MgO + 2 Fe; What is the Ratio of moles of MgO to moles Fe?

a)

3mol Mg / 2 mol Fe

b)

2 mol Mg/ 3 mol Fe

c)

1 mol Fe/ 2 mol Fe

d)

3 mol MgO / 2 mol Fe

4.

How do we get mass from moles?

a)

multiply by avogadro's number

b)

multiply by molar mass

c)

divide by avogadro's number

d)

divide by molar mass

5.

The limiting reactant is the reactant that __________ .

a)

slows down the reaction

b)

used up first

c)

left over at the end of reaction

d)

controls the speed of the reaction

6.

How many water molecules are in 5.2 moles of water?

a)

6.02 x 10²³

b)

5.2

c)

3.1304 x 10²⁴

d)

8.638 x 10^-24

7.

A student inflates a balloon with helium then places it in the freezer. The student should expect

a)

the balloon's volume to increase

b)

the balloon's volume to decrease

c)

the balloon's moles to increase

d)

the balloon's moles to decrease

8.

What about gases can be measured?

a)

Pressure and Volume

b)

Temperature, Volume, and Pressure

c)

Volume and Temperature

d)

Pressure, Temperature, Volume, and Moles

9.

Calculate the volume that a 0.323-mol sample of a gas will occupy at 265 K and a pressure of 0.900 atm.

a)

7.18 L

b)

7.81 L

c)

4.63 L

d)

4.36 L

10.

Pressure is

a)

defined as the mass that an object exerts when at rest.

b)

not a measurable in gases.

c)

defined as the number of moles of substance divided by the mass of the substance.

d)

created by the force of the gas particles impacting the walls of the container.

11.

What is the pressure exerted by 5.00 moles of nitrogen gas contained in a 30.0 Liter container at 25.0 °C?

a)

3670 atm

b)

0.245 atm

c)

4.08 atm

d)

605 atm

12.

If 3.0 L of helium at 293 K with a pressure of 200 kPa is allowed to expand to 4.4 L with the pressure staying constant. What is the new temperature?

a)

702 K

b)

430 K

c)

157 K

d)

0 K

13.

A sample of carbon dioxide experiences a change in volume from 54.16 L to 22.323 L. If its new pressure is 554.05 kPa, what was its original pressure in kilopascals?

(a)

14.

While making homemade ice cream, you add rock salt to the ice. Which choice below provides the best explanation for why this is done?

a)

Adding salt to the ice will lower the freezing point by creating a solution that's freezing point is lower than just the ice.

b)

Adding salt to the ice will lower the freezing point by creating a solution that's freezing point is higher than just the ice.

c)

Adding salt to the ice will raise the freezing point by creating a solution that's freezing point is lower than just the ice.

d)

Adding salt to the ice will raise the freezing point by creating a solution that's freezing point is higher than just the ice.

15.

How many moles of NaCl are present in a solution with a molarity of 8.59 M and a volume of 125 mL?

a)

1074 mol

b)

0.069 mol

c)

1.07 mol

d)

62.7 mol

16.

What is the molality of a solution made by dissolving 2 moles of NaOH in 400 grams of water?

a)

5 mol/kg. solvent

b)

4 mol/kg solvent

c)

3 mol/kg. solvent

d)

2.5 moles /kg solvent

17.

Which element will have a higher electronegativity than Arsenic (As) ?

a)

Carbon

b)

Antimony

c)

Germanium

d)

Neon

18.

A reaction that shows a substance being broken down into simpler substances, is what type of reaction?

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

19.

$WO_3+H_2\ \rightarrow\ W+H_2O\$
Balance the following equation. How many moles of hydrogen gas are needed for this reaction?

a)

1

b)

2

c)

3

d)

4

20.

How many atoms are in 1 mole of NaCl?

a)

11 atoms

b)

17 atoms

c)

58 atoms

d)

$6.02\ x\ 10^{23}$ atoms

21.

$AB+CD\ \rightarrow\ AD\ +\ CB$

What type of reaction is modeled by the equation above?

a)

Decomposition

b)

Synthesis

c)

Single Replacement

d)

Double Replacement

22.

Fill in both blanks: Positively charged particles are called ___(1)____ and are written first in a compound because they are ___(2)____.

a)

(1) cations (2) nonmetals

b)

(1) anions (2) nonmetals

c)

(1) cations (2) metals

d)

(1) anions (2) metals

23.

How many moles are in 20 grams of calcium?

a)

0.5

b)

1

c)

3

d)

20

24.

$3\ Mg+1\ Fe_2O_3\ →\ 3\ MgO+2\ Fe$

For the balanced reaction above, what is the mole ratio of moles of Mg to moles of Fe?

a)

3 mol Mg / 2 mol Fe

b)

1 mol Fe / 2 mol Fe

c)

2 mol Mg / 3 mol Fe

d)

3 mol MgO / 2 mol Fe

25.

You need 2 pieces of bread, 1 tablespoon of peanut butter and 2 tablespoons of jelly to make a sandwich. If you have 10 pieces of bread, 4 tablespoons of peanut butter and 20 tablespoons of jelly, what is the limiting reactant?

a)

bread

b)

jelly

c)

peanut butter

d)

sandwhich

26.

How many moles are in 7.2 grams of carbon?

a)

0.7625 moles of C

b)

86.479 moles of C

c)

0.599 moles of C

d)

74.396 moles of C

27.

$Al_2S_3$
Name the compound above according to the correct nomenclature.

a)

aluminum sulfide

b)

ammonium sulfide

c)

dialuminum trisulfide

d)

aluminum (II) sulfide

28.

What are the coefficient used to balance the equation below?

__Ag₂O →__ Ag +___O₂

a)

2,4,1

b)

2,1,2

c)

1,1,1

d)

2,2,2

29.

$Ca+AlCl_3$

The reactants above undergo a single replacement reaction, predict the products formed

a)

$CaCl_2+Al$

b)

$Ca_3Al+Cl_2$

c)

$Ca\ +\ Al^{+3}+\ Cl_2$

d)

$CaAlCl_3$

30.

$2H_2+O_2\rightarrow\ 2H_2O$

What type of reaction is the one above?

a)

synthesis

b)

decomposition

c)

single replacement

d)

double replacement

31.

$CuS+Al−>Al_2S_3+Cu$
(1) balance the chemical reaction above
(2) identify the type of reaction

a)

undefined

b)

(1) 6, 4, 1, 3 (2) synthesis

c)

(1) 3, 2, 1, 3 (2) single replacement

d)

(1) 6, 4, 2, 3 (2) single replacement

32.

What has happened to a substance if it starts at point B and goes to point C?

a)

Nothing

b)

It melted

c)

It evaporated

d)

It got warmer

33.

What is it called when a solid becomes a gas?

a)

Melting

b)

Freezing

c)

Sublimation

d)

Deposition

34.

Condensation is the name of what phase change?

a)

Solid to Liquid

b)

Gas to Liquid

c)

Liquid to Solid

d)

Gas to Solid

35.

What phase exists at point A?

a)

Solid

b)

Liquid

c)

Gas

d)

All Three

36.

What would the freezing point of this substance be?

a)

0^o

b)

70^o

c)

140^o

d)

97^o

37.

A magician changes a gas into a liquid with out changing its temp. How did he do this?

a)

By dissolving something into the liquid.

b)

He learned to do it at Hogwarts

c)

By increasing the atmospheric pressure

d)

By adding an acid

38.

List the states of matter in order from most densely packed particles to least densely packed

a)

Solid, Liquid, Gas

b)

Liquid, Gas, Solid

c)

Gas, Liquid, Solid

d)

Solid, Gas, Liquid

39.

Does this equation follow the law of conservation of mass? MgCl2 + KOH → MgOH2 + KCl

a)

Yes, it has an equal number of atoms in the reactants and products.

b)

Yes, the same types of atoms are present in both the reactants and products.

c)

No, there are different molecules in the reactants and products

d)

No, the amount of each type of atom is not the same in the reactants and the products.

40.

What element is Cl

a)

Chlorine

b)

Cleaner

c)

Cleaon

d)

Sodium

41.

How does adding heat affect liquid water?

a)

it becomes a solid

b)

its molecules move faster

c)

new substances form

d)

a color change is produced

42.

A catalyst works by

a)

changing the order of the reaction

b)

increasing the temperature

c)

lowering the activation energy

d)

making the activated complex

43.

How do you calculate Enthalpy of a reaction?

a)

ΔH = ΔH_products- ΔH_reactants

b)

ΔT = q / mC

c)

ΔG = ΔH -TΔS

d)

E = mc²

44.

Which segment best represents the warming of a solid?

a)

1 to 2

b)

2 to 3

c)

3 to 4

d)

4 to 5

e)

5 to 6

45.

Which segment best represents the warming of a gas?

a)

1 to 2

b)

2 to 3

c)

3 to 4

d)

4 to 5

e)

5 to 6

46.

Which segment best represents boiling?

a)

1 to 2

b)

2 to 3

c)

3 to 4

d)

4 to 5

e)

5 to 6

47.

Which segment best represents melting?

a)

1 to 2

b)

2 to 3

c)

3 to 4

d)

4 to 5

e)

5 to 6

48.

Which segment best represents warming of a liquid?

a)

1 to 2

b)

2 to 3

c)

3 to 4

d)

4 to 5

e)

5 to 6

49.

(Hess's Law)Calculate the ∆H for the following reaction: 2H₂O₂→ 2H₂O + 1 O₂
You are given these two equations:
2H₂+ O₂ → 2H₂O ∆H = -572 kJ
H₂ + O₂→ H₂O₂ ∆H = -188 kJ

a)

∆H = -948 kJ

b)

∆H = -196 kJ

c)

∆H = -384 kJ

d)

∆H = -188 kJ

Chemistry Spring Final Review

Total questions: 49

Worksheet time: 4hrs 5mins

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