Free Printable Unit 9: Stoic Mandatory Review

1.

Match the following conversions to where you get them.

Categorize the following

from balanced equation

memorized: 6 x 10^23

from periodic table

g/mol

converts grams to moles

converts particles to moles

converts liters to moles

converts moles of A to moles of B

molar mass

avogadro's numer

volume conversion

mole ratio

2.

Is there anything wrong with this set up of stoichiometry? If so, choose what is wrong. If not, choose the blank box.

A

B

C

3.

Is there anything wrong with this set up? If so, choose the wrong part. If not, choose the blank box.

A

B

C

4.

Where will the mole ratio of K to KBr go? If no mole ratio is used, choose the blank box.

A

B

C

D

5.

Where will the molar mass of K (Potassium) go? If no molar mass is used, choose the blank box.

A

B

C

D

6.

What goes in the purple spot?

A

B

C

D

E

F

G

7.

What goes in the blue spot?

A

B

C

D

E

F

G

8.

What goes in the green spot?

A

B

C

D

E

F

G

9.

Match the following conversions to where you get them.

Categorize the following

from balanced equation

memorized 22.4

memorized: 6 x 10^23

from periodic table

g/mol

particles/atoms/compounds

Liters

mole of _/mole of _

converts grams to moles

converts particles to moles

converts liters to moles

converts moles of A to moles of B

molar mass

avogadro's numer

volume conversion

mole ratio

10.

Which of the following statements regarding the mole is NOT correct?

a)

A mole is a counting unit

b)

Equal to 6.022 x 10²³ particles.

c)

The concept of mole is similar to the concept of dozen

d)

none of the above

11.

Match the following

a)

converts grams of A to moles of A

1.

molar mass of A

b)

converts particles of A to moles of A

2.

avogadro's number

c)

converts moles of B to moles of A

3.

molar ratio:

$\frac{mole\ of\ A}{moles\ of\ B}$

d)

converts moles of A to moles of B

4.

molar ratio:

$\frac{mole\ of\ B}{moles\ of\ A}$

e)

converts grams of A to grams of B

5.

does not exist

12.

Put the correct labels in the correct spots.

a)mole ratio

b)molar mass of sodium

c)given of Al(OH)3

d)molar mass of Al(OH)3

1

2

3

4

1)

2)

3)

4)

13.

Of which of the following can you get from the BALANCED reaction?

a)

mole ratio

b)

molar mass

c)

avogadro's number

d)

# Liters per mole

14.

Reorder the following when converting from grams of a to moles of B

Categorize the following

molar mass of B

mole ratio b/a

mole ratio a/b

molar mass of a

1st

2nd

not used

15.

Reorder the following when converting from moles of a to grams of B

Categorize the following

molar mass of B

mole ratio b/a

mole ratio a/b

molar mass of a

1st

2nd

not used

16.

Reorder the following when converting from grams of a to grams of b

Categorize the following

molar mass of B

mole ratio b/a

mole ratio a/b

molar mass of a

1st

2nd

not used

3rd

17.

B₂H₆ + 3O₂ -->2 HBO₂ + 2 H₂O
What mass of O₂ will be needed to burn 36.1 g of B₂H₆?

a)

13.8 g O₂

b)

3.86 mol of O₂

c)

124 g O₂

18.

B₂H₆ + 3O₂ -->2 HBO₂ + 2 H₂O
What mass of HBO₂ could be created from 124.5 grams of O₂? (do not put the unit)

(a) grams of HBO₂

19.

B₂H₆ + 3O₂ -->2 HBO₂ + 2 H₂O
What mass of B₂H₆ will be needed to create 4.6 moles of water? (do not put units)

(a) grams of B₂H₆

20.

4 Al + 3 O₂ –> 2 Al₂O₃ How much aluminum would be needed to completely react with 45 grams of O₂?

a)

1.05 moles

b)

3.75 moles

c)

1.875 grams

d)

1.875 moles

21.

4 Al + 3 O₂ –> 2 Al₂O₃

What is the theoretical yield of aluminum oxide in grams when 24 moles of oxygen reacts with excess aluminum? (do not put units)

(a) grams of Al₂O₃

22.

4 Al + 3 O₂ –> 2 Al₂O₃

What is the theoretical yield of aluminum oxide in grams when 102.55 grams of aluminum with excess oxygen? (do not put units)

(a) grams of Al₂O₃

23.

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

24.

2Al + 3H₂SO₄ -> Al₂(SO₄)₃ + 3H₂
How many moles of hydrogen would be created if 14 grams of aluminum completely reacted? (do not put units)

(a) moles of hydrogen

25.

2Al + 3H₂SO₄ -> Al₂(SO₄)₃ + 3H₂
How many moles of hydrogen would be created if 14 grams of aluminum completely reacted? (do not put units)

(a) moles of hydrogen

26.

2Al + 3H₂SO₄ -> Al₂(SO₄)₃ + 3H₂
How many moles of hydrogen would be created if 14 grams of aluminum completely reacted? (do not put units)

(a) moles of hydrogen

27.

Mg + 2 HCl --> MgCl₂ + H₂
How many moles of HCl are consumed in the production of 7.5 moles of MgCl₂?

a)

3.8 moles

b)

15 moles

c)

7.5 moles

d)

23 moles

28.

Mg + 2 HCl --> MgCl₂ + H₂
How many moles of hydrogen are consumed in the production of 7.5 grams of HCl? (do not put units)

(a) moles of hydrogen

29.

CaC₂(s) + 2H₂O(l) --> C₂H₂(g) + Ca(OH)₂(aq)
how many grams of Ca(OH)₂ would be formed with 3.20 moles of CaC₂?

a)

119 g

b)

21.2 g

c)

114 g

d)

237 g

30.

Using the following equation:
4NH₃ + 5O₂ --> 4NO + 6H₂O
How many grams of oxygen gas are needed to react with 56.8 grams of ammonia?

a)

45.08 g O₂

b)

133.33 g O₂

c)

260.77 g O₂

d)

75.92 g O₂

31.

4NH₃ + 5O₂ --> 4NO + 6H₂O
How many grams of grams of nitrogen monoxide could be produced from 12.75 moles of ammonia? (do not put your units)

(a) grams of nitrogen monoxide

32.

CH₄ + 2 O₂ → CO₂ + 2 H₂O
How many moles of carbon dioxide are produced from the combustion of 110 g of CH₄?

a)

13.7 mol

b)

2.75 mol

c)

6.11 mol

d)

6.85 mol

33.

CH₄ + 2 O₂ → CO₂ + 2 H₂O
How many grams of methane (CH4) should be used to produce 15.24 moles of water? (do not put your units)

(a) grams of methane

34.

Fe (s) + S (l) --> FeS (s)

In the experiment above, 7.62 g of Fe are allowed to react with 8.67 g of S.
How much FeS is formed?

a)

14.8 g

b)

12.2 g

c)

13.7 g

d)

19.9 g

35.

Cl₂ + 2 KBr → Br₂ + 2 KCl
How many grams of potassium chloride can be produced from 356 g of potassium bromide? (do not put the unit)

(a) grams of KCl

36.

Cl₂ + 2 KBr → Br₂ + 2 KCl
How many grams of bromine gas can be produced from 2.30 moles of potassium bromide? (do not put the unit)

(a) grams of bromine gas

37.

2 Na + 2 H₂O → 2 NaOH + H₂
How many grams of hydrogen are produced if 120 g of Na are available?

a)

5.2 g

b)

2.6 g

c)

690 g

d)

45 g

38.

2 Na + 2 H₂O → 2 NaOH + H₂
How many moles of sodium hydroxide are produced from 88.23 grams of sodium? (do not put your units)

(a) moles of sodium hydroxide

39.

2 Na + 2 H₂O → 2 NaOH + H₂
How many grams sodium would be needed to create 40.2 moles of hydrogen gas? (No units are needed)

(a) grams of sodium

40.

The (a) yield is the maximum amount of product possible in a reaction. This determines the amount of product that should be produced in a perfect setting.

Choose from the below words

Percent

actual

stoichiometry

theoretical

41.

When reacting Na with Cl₂, we calculated that the theoretical yield should be 13 grams. Our actual yield was 12.5 grams. What is the percent yield?

a)

90.4%

b)

104%

c)

96.15%

d)

1.04%

42.

2Fe₂O₃ + 3C → 4Fe + 3CO₂

You add 28 grams of carbon. You find the actual yield to be 81.2 grams of CO₂. What is the percent yield of CO₂? (Hint: calculate theoretical yield of CO₂ first)

a)

58.83%

b)

308%

c)

6435%

d)

79.14%

43.

Theoretical yield = 73g
Actual yield = 62g
Calculate the percent yield.

a)

1.16%

b)

116%

c)

85%

d)

76%

44.

11.

LiOH + KCl → LiCl + KOH

b) I actually produced 6 grams of lithium chloride and I began this reaction with 20.0 grams of lithium hydroxide. What is my percent yield?

a)

16.9%

b)

5.91%

c)

1.88%

d)

12.3%

45.

In a lab, a scientist calculate he should produce 12.3 grams of product in his experiment. When he is finished collecting his product it weighs 10.1 grams. What is his percent yield?

a)

82%

b)

0.82%

c)

10.1 %

d)

100%

46.

The reaction of 25.0 g benzene, C₆H₆, with excess HNO₃ resulted in 21.4 g C₆H₅NO₂. What is the percentage yield?

C₆H₆ + HNO₃ → C₆H₅NO₂ + H₂O

a)

100%

b)

27.39%

c)

54.29%

d)

85.62%

47.

Lead nitrate can be decomposed by heating. What is the % yield of the decomposition reaction if 7.4g Pb(NO₃)₂ are heated to give 4.1 g PbO?
2Pb(NO₃)_{2 (s)}→2PbO_(s)+4NO_2(g)+O_2(g)

a)

82%

b)

44%

c)

56%

d)

67%

48.

Zn + 2HCl → ZnCl₂ + H₂
15 grams of HCl should theoretically produce 0.42 grams of H₂. The reaction actually produced 0.15 grams of H₂. What is the percent yield of H₂?

a)

2.8%

b)

280%

c)

1%

d)

36%

49.

Zn + CuCl₂ → ZnCl₂ + Cu
How many grams of ZnCl₂ will be produced from 23.0 g of Zn

a)

0.354 moles

b)

1495 moles

c)

47.76 g

50.

Zn + CuCl₂ → ZnCl₂ + Cu
How many moles of ZnCl₂ will be produced from 23.0 g of Zn

a)

0.354 moles

b)

1495 moles

c)

47.76 g

51.

Theoretical yield = 73g
Actual yield = 62g
Calculate the percent yield.

a)

1.16%

b)

116%

c)

85%

d)

76%

52.

Percent yield = 100%
Theoretical yield = 88 grams
What is your actual yield?

a)

88 grams

b)

88%

c)

100 grams

d)

22%

53.

Which of the following do you get through measuring its mass? (No calculations)

a)

percent yield

b)

theoretical yield

c)

actual yield

d)

limiting reagent

54.

Your percent yield is 80%. The actual amount of product produced was 29.1 grams. What is the theoretical yield?

a)

25.2 grams

b)

37.3 grams

c)

37.1 grams

d)

36.3 grams

55.

Organize these options into the right categories

Categorize the following

calculated

measured

gotten from lab

gotten on paper

how much should be produced

given

what is produced in person

need to use stoichiometry

Theoretical Yield

Actual Yield

56.

Fill in the formula for percent yield.

(a) = (b) / (c) x (d)

Choose from the below words

% Yield

100%

actual yield

theoretical yield

limiting reactant

excess reactant

excess product

57.

This is what you call a reactant that you have enough of. The one that DOES NOT run out.

a)

Limiting Reactant

b)

Excess Reactant

c)

Highly Reactant

d)

Super Reactant

58.

A limiting reactant is a reactant that.....

a)

runs out during a chemical reaction

b)

causes a reaction to stop

c)

determines the amount of products that can be made

d)

all of these

59.

Use the equation 2 Al + 3 Cl₂ ---> 2 AlCl₃. If 2 moles of aluminum and 2 moles of chlorine are reacted, identify the limiting reactant.

a)

AlCl3

b)

Cl2

c)

Al

60.

What is the limiting reactant if 10 moles of NH₃ react with 30.0 moles of NO?
4NH₃+6NO --> 5N₂ + 6H₂O

a)

NH₃

b)

NO

c)

N₂

d)

water

61.

P₄+ 3O₂--> P₄O₆
What is the limiting reactant is 12 moles of P₄react with 15 moles of O₂?

a)

P₄

b)

O₂

c)

P₄O₆

d)

none of the above

62.

P₄+ 3O₂--> P₄O₆

How many moles of P₄O₆can be made if 3 moles of P₄react with 6 moles of O₂?

a)

1 mole

b)

2 moles

c)

4 moles

d)

0 moles

63.

How much water can be made if 8 moles of NH₃ react with 6 moles of NO?

4NH₃+6NO --> 5N₂ + 6H₂O

a)

5 moles

b)

6 moles

c)

12 moles

d)

18 moles

64.

Use the equation 2 Al + 3 Cl₂ ---> 2 AlCl₃. If 2 moles of aluminum and 3 moles of chlorine are reacted, how much AlCl₃can be made?

a)

1 mole

b)

2 moles

c)

4 moles

d)

0 moles

65.

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)

sandwich

66.

CH₄ + 2H₂O --> CO₂+ 4H₂What is the limiting reactant when 20g CH₄react with 15g H₂O?

a)

CH₄

b)

H₂O

c)

CO₂

d)

H₂

67.

Fe + S --> FeS
If 7.62g Fe react with 8.67g S, what is the limiting reactant?

a)

Fe

b)

S

c)

FeS

d)

none

68.

SO₂+ PCl₅--> SOCl₂+ POCl₃
How much SOCl₂is produced when 16.2g SO₂react with 13.7g PCl_5?

a)

7.87g

b)

30.1g

c)

26.4g

d)

19.8g

69.

C₃H₈+ 5O₂--> 3CO₂+ 4H₂O
How much carbon dioxide is produced when 3.0g of propane is burned in 2.1g of oxygen?

a)

0.55g

b)

0.038g

c)

2.9g

d)

0.90g

70.

2 NaCl + Pb(NO₃)₂ --> 2 NaNO₃ + PbCl₂

How many grams of lead II chloride are produced from the reaction of 15.3 g of NaCl and 60.8 g of Pb(NO₃)₂?

a)

21.5g

b)

51.1g

c)

43.4g

d)

36.4g

71.

If a chemist calculates the maximum amount of product that could be obtained from a chemical reaction, he or she is calculating the

a)

Theoretical yield

b)

Mole ratio

c)

Actual yield

d)

Percentage yield

72.

Cl₂ + 2KBr → Br₂ + 2KCl

How many grams of potassium chloride can be produced from 356 g of chlorine and 356 g of potassium bromide?

a)

749 g

b)

223 g

c)

479 g

d)

814 g

73.

Mg + 2HCl → MgCl₂ + H₂

Identify the limiting reactant when 6.00 g HCl combines with 5.00 g Mg to form MgCl₂.

a)

Mg

b)

H₂

c)

MgCl₂

d)

HCl

74.

4NH₃+ 6NO → 5N₂ + 6H₂O

What is the limiting reactant if 10 moles of NH₃ react with 30 moles of NO?

a)

NH₃

b)

NO

c)

N₂

d)

H₂O

75.

4NH₃+ 5O₂ → 4NO + 6H₂O

How many grams of NO are formed if 6.30 g of ammonia react with 1.80 g of oxygen?

a)

0.370 g

b)

0.0450 g

c)

1.35 g

d)

11.1 g

76.

CH₄ + 2H₂O → CO₂+ 4H₂

How many grams of CO₂ will form when 20.0 g of CH₄reacts with 15.0 g of H₂O?

a)

65.3 g

b)

18.3 g

c)

54.8 g

d)

15.0 g

77.

SO₂+ PCl₅→ SOCl₂+ POCl₃

How much SOCl₂is produced when 16.2 g of SO₂reacts with 13.7 g PCl_5?

a)

7.83 g

b)

30.1 g

c)

26.4 g

d)

19.8 g

78.

$2HgO\ \rightarrow\ 2Hg\ +\ O_2$
What is the ratio of HgO to Hg?

a)

2:2

b)

1:1

c)

2:1

d)

1:2

79.

$2HgO\ \rightarrow\ 2Hg\ +\ O_2$
What is the ratio of Hg to O₂?

a)

2:2

b)

1:1

c)

2:1

d)

1:2

80.

$2HgO\ \rightarrow\ 2Hg\ +\ O_2$
What is the ratio of HgO to O₂?

a)

2:2

b)

1:1

c)

2:1

d)

1:2

81.

$2HgO\ \rightarrow\ 2Hg\ +\ O_2$
How many moles of O₂ could be produced if you started with 10 moles of HgO?

a)

10 moles of O2

b)

20 moles of O2

c)

5 moles of O2

d)

40 moles of O2

e)

2.5 moles of O2

82.

$2HgO\ \rightarrow\ 2Hg\ +\ O_2$
How many moles of Hg could be produced if you started with 10 moles of HgO?

a)

10 moles of Hg

b)

20 moles of Hg

c)

5 moles of Hg

d)

40 moles of Hg

e)

2.5 moles of Hg

83.

$4NH_3+6NO\ \rightarrow\ 5N_2+6H_2O$
What is the ratio of $H_2O$ to $N_2$ ?

a)

4:5

b)

1:1

c)

6:5

d)

5:6

84.

$4NH_3+6NO\ \rightarrow\ 5N_2+6H_2O$
What is the ratio of $N0$ to $N_2$ ?

a)

4:5

b)

1:1

c)

6:5

d)

5:6

85.

$4NH_3+6NO\ \rightarrow\ 5N_2+6H_2O$
What is the ratio of NH₃ to NO?

a)

4:5

b)

1:1

c)

2:3

d)

4:6

86.

$4NH_3+6NO\ \rightarrow\ 5N_2+6H_2O$
What is the ratio of $NH_3$ to $N_2$ ?

a)

4:5

b)

1:1

c)

2:3

d)

5:6

87.

$4NH_3+6NO\ \rightarrow\ 5N_2+6H_2O$
How many moles of N₂ could be produced if you started with 12 moles of NH₃?

a)

15 moles of N₂

b)

9.6 moles of N₂

c)

240 moles of N₂

d)

3 moles of N₂

e)

2.5 moles of N₂

88.

$4NH_3+6NO\ \rightarrow\ 5N_2+6H_2O$
How many moles of H₂O could be produced if you started with 12 moles of NH₃?

a)

15 moles of H₂O

b)

8 moles of H₂O

c)

18 moles of H₂O

d)

3 moles of H₂O

e)

72 moles of H₂O

89.

$4NH_3+6NO\ \rightarrow\ 5N_2+6H_2O$
How many moles of NO did you start with if you ended with 20 moles of N₂?

a)

4 moles of NO

b)

24 moles of NO

c)

25 moles of NO

d)

16.7 moles of NO

e)

20 moles of NO

90.

$CO_2\ +\ LiOH\ \rightarrow\ Li_2CO_3\ +\ H_2O$
What is the ratio of $H_2O$ to $LiOH$ ?

a)

1:1

b)

1:2

c)

2:2

d)

2:1

91.

$CO_2\ +\ LiOH\ \rightarrow\ Li_2CO_3\ +\ H_2O$
What is the ratio of $H_2O$ to $CO_2$ ?

a)

1:1

b)

1:2

c)

2:2

d)

2:1

92.

$CO_2\ +\ LiOH\ \rightarrow\ Li_2CO_3\ +\ H_2O$
What is the ratio of $CO_2$ to $Li_2CO_3$ ?

a)

1:1

b)

1:2

c)

2:2

d)

2:1

93.

$CO_2\ +\ LiOH\ \rightarrow\ Li_2CO_3\ +\ H_2O$
How many moles of H₂O could be produced if 4 moles of LiOH were given to start with?

a)

4 moles of H₂O

b)

2 moles of H₂O

c)

1 moles of H₂O

d)

8 moles of H₂O

e)

3 moles of H₂O

94.

$CO_2\ +\ LiOH\ \rightarrow\ Li_2CO_3\ +\ H_2O$
How many moles of Li₂CO₃ could be produced if 12 moles of LiOH were given to start with?

a)

24 moles of H₂O

b)

12 moles of H₂O

c)

6 moles of H₂O

d)

2 moles of H₂O

e)

3 moles of H₂O

95.

2HgO→2Hg + O₂
If I decompose 34 moles of HgO, how many moles of oxygen will I produce?

What will the ratio that you use look like in this problem?
$\frac{34\ moles\ HgO}{ }\times\frac{\ \ \ \ \ ?\ \ \ \ }{?}$

a)

$\frac{1mole\ O_2}{2\ mole\ HgO}$

b)

$\frac{2\ mole\ HgO}{1\ mole\ O_2}$

c)

$\frac{2\ mole\ Hg}{1\ mole\ O_2}$

d)

$\frac{1mole\ O_2}{1\ mole\ HgO}$

e)

$\frac{2\ mole\ O_2}{1\ mole\ HgO}$

96.

2HgO→2Hg + O₂
If I decompose 34 moles of HgO, how many moles of Hg will I produce?

What will the ratio that you use look like in this problem?
$\frac{34\ moles\ HgO}{ }\times\frac{\ \ \ \ \ ?\ \ \ \ }{?}$

a)

$\frac{2\ mole\ HgO}{2\ mole\ Hg}$

b)

$\frac{1\ mole\ Hg}{1\ mole\ HgO}$

c)

$\frac{1\ mole\ HgO}{1\ mole\ Hg}$

d)

$\frac{1mole\ O_2}{1\ mole\ HgO}$

e)

$\frac{2\ mole\ O_2}{1\ mole\ HgO}$

97.

$4NH_3+6NO\rightarrow5N_2+6H_2O$
Bacteria will cause ammonia $NH_3$ to react with NO to put nitrogen back in the air, along with water, as part of the nitrogen cycle. If there are 3.56 moles of NO in the soil, how many moles of ammonia are needed to react with it?

$\frac{3.56\ moles\ NO}{ }\times\frac{\ \ \ \ \ ?\ \ \ \ }{?}$

a)

$\frac{\ 6\ mole\ NO}{4\ mole\ NH_3}$

b)

$\frac{2\ mole\ NH_3}{3\ mole\ NO}$

c)

$\frac{6\ mole\ Hg}{5\ mole\ N_2}$

d)

$\frac{3\ mole\ NH_3}{2\ mole\ NO}$

e)

$\frac{\ 3\ mole\ NO}{2\ mole\ NH_3}$

98.

$4NH_3+6NO\rightarrow5N_2+6H_2O$
Bacteria will cause ammonia $NH_3$ to react with NO to put nitrogen back in the air, along with water, as part of the nitrogen cycle. If there are 3.56 moles of NO in the soil, how many moles of water would be produced?

$\frac{3.56\ moles\ NO}{ }\times\frac{\ \ \ \ \ ?\ \ \ \ }{?}$

a)

$\frac{\ 6\ mole\ NO}{4\ mole\ NH_3}$

b)

$\frac{2\ mole\ NH_3}{3\ mole\ NO}$

c)

$\frac{6\ mole\ Hg}{5\ mole\ N_2}$

d)

$\frac{1\ mole\ H_2O}{1\ mole\ NO}$

e)

$\frac{6\ mole\ H_2O}{4\ mole\ NO}$

99.

$4NH_3+6NO\rightarrow5N_2+6H_2O$
How many moles of nitrogen will be produced with 3.56 moles of NO in the soil?

$\frac{3.56\ moles\ NO}{ }\times\frac{\ \ \ \ \ ?\ \ \ \ }{?}$

a)

$\frac{\ 6\ mole\ NO}{6\ mole\ H_2O}$

b)

$\frac{1\ mole\ N_2}{1\ mole\ NO}$

c)

$\frac{1\ mole\ H_2O}{1\ mole\ N_2}$

d)

$\frac{6\ mole\ NO}{5\ mole\ N_2}$

e)

$\frac{5\ mole\ N_2}{6\ mole\ NO}$

100.

What is ratio of blue to orange

a)

3/2

b)

3/5

c)

2/3

d)

2/5

101.

Mole Ratios used for conversions are derived from:

a)

the molar mass of the reactants in the balanced chemical equation

b)

the coefficients of the balanced chemical equation

c)

the subscripts of the products in the balanced chemical equation

d)

the group number of each element in the balanced chemical equation

102.

What is the mole ratio of Mg to MgCl₂?

Mg + HCl → MgCl₂ + H₂

a)

2 mol Mg/ 1 mol MgCl₂

b)

1 mol Mg/ 2 mol MgCl₂

c)

1 mol Mg/ 1 mol MgCl₂

d)

2 mol Mg/ 2 mol MgCl₂

103.

What is the mole ratio of Ba(OH)₂ to AlPO₄?

AlPO₄ + Ba(OH)₂ → Al(OH)₃ + Ba₃(PO₄)₂

a)

3 mol Ba(OH)₂ / 2 mol AlPO₄

b)

1 mol Ba(OH)₂/ 1 mol AlPO₄

c)

2 mol Ba(OH)₂/ 3 mol AlPO₄

d)

1 mol Ba(OH)₂/ 3 mol AlPO₄

104.

What are the missing coefficients for the unbalanced equation below?

AlPO₄ + Ba(OH)₂ → Al(OH)₃ + Ba₃(PO₄)₂

a)

1,3,2,3

b)

2,3,2,3

c)

3,2,3,1

d)

2,3,2,1

105.

Mg_(s) + HCl_(aq) →MgCl_2(aq) + H_2(g)

The reaction of 2.5 mol of HCl will produce ______ mol of MgCl_2.

a)

2.5

b)

1.25

c)

5.0

d)

1.0

106.

If there are 2 moles of oxygen available, which mole ratio will tells how much water is produced?

C₃H₈ +5O₂ → 3CO₂ + 4H₂O

a)

4 mol H₂O/ 5 mol O₂

b)

5 mol O₂/ 4 mol H₂O

c)

2 mol O₂/ 4 mol H₂O

d)

4 mol O₂/ 2 mol H₂O

107.

If there are 10 moles of propane, C₃H₈, which mole ratio will tells how much oxygen is required for the reaction to take place?

C₃H₈ + 5O₂ → 3CO₂ + 4H₂O

a)

1 mol C₃H₈/ 5 mol O₂

b)

5 mol O₂/ 1 mol C₃H₈

c)

5 mol O₂/ 10 mol C₃H₈

d)

10 mol C₃H₈/ 5 mol O₂

108.

Which mole ratio tells how much aluminum oxide is produced from 3 moles of aluminum?

4Al + 3O₂ → 2Al₂O₃

a)

3 mol Al/ 2 mol Al₂O₃

b)

2 mol Al₂O₃/ 4 mol Al

c)

4 mol Al/ 2 mol Al₂O₃

d)

2 mol Al₂O₃/ 3 mol Al

109.

Using the reaction below,

4Al + 3O₂ → 2Al₂O₃

How many moles of aluminum oxide are produced from 6 moles of oxygen?

a)

8 mol

b)

6 mol

c)

4 mol

d)

2 mol

110.

In the equation 2 Al2O3 --> 4 Al + 3 O2, what is the mole ratio of aluminum to oxygen?

a)

10:6

b)

3:4

c)

4:3

d)

2:3

111.

What can be determined from a balanced chemical equation?

a)

Mole ratio of any two substances in the reaction

b)

Energy released in the reaction.

c)

Electron configuration of all elements in the reaction.

d)

Mechanism involved in the reaction.

112.

What can be determined from a balanced chemical equation?

a)

Mole ratio

b)

number of atoms in a mole

c)

Avogadro's number

d)

22.4 L

Unit 9: Stoic Mandatory Review

Total questions: 112

Worksheet time: 5hrs 39mins

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