Free Printable Honors Chem Chapter 3

Free Printable Worksheets

Worksheets

Honors Chem Chapter 3

Total questions: 95

Worksheet time: 3hrs 10mins

Name

Class

Date

1.

What is the molar mass of CH₃F?

(a)

2.

What is the molar mass of CH₃Pe?

(Pe is a fictional element said to have been found on the dwarf planet Pluto)

(a)

3.

What is the molar mass of CH₂Pe₂?

(Pe is a fictional element said to have been found on the dwarf planet Pluto)

(a)

4.

What is the molar mass of As₂Pe₃?

(Pe is a fictional element said to have been found on the dwarf planet Pluto)

(a)

5.

What is the molar mass of CH₂Zf₂?

(Zaepfelium is a new element your teacher discovered)

(a)

6.

What is the molar mass of ZfO₂?

(Zaepfelium is a new element your teacher discovered)

(a)

7.

What is the molar mass of C₉H₈Zf₄?

(Zaepfelium is a new element your teacher discovered)

(a)

8.

What is the molar mass of Zf₂(SO₄)₃?

(Zaepfelium is a new element your teacher discovered)

(a)

9.

What is the molar mass of CZf₄?

(Zaepfelium is a new element your teacher discovered)

(a)

10.

What is the molar mass of Fe₃(ZfO₄)₂?

(Zaepfelium is a new element your teacher discovered)

(a)

11.

What is the molar mass of As₂Zf₃?

(Zaepfelium is a new element your teacher discovered)

(a)

12.

What is the molar mass of N₂Zf₅?

(Zaepfelium is a new element your teacher discovered)

(a)

13.

What is the molar mass of ZfCl₅?

(Zaepfelium is a new element your teacher discovered)

(a)

14.

In one breath, about 0.037 g of CO2 is exhaled. How many moles of CO2 is this?

a)

0.000841

b)

1.628

c)

1189.5

d)

2.23E22

e)

5.06E20

15.

A 40oz water bottle is about 1100 g of H2O. How many moles of water is this?

a)

61.06

b)

19816.5

c)

0.01638

d)

6.62E26

e)

3.68E25

16.

How many moles is 35.8 g of OZf₂?

(Zaepfelium is a new element your teacher discovered)

a)

0.558

b)

2295

c)

1.79

d)

2.16E25

e)

3.36E23

17.

How many moles is 115 g of OZf₂?

(Zaepfelium is a new element your teacher discovered)

a)

0.558

b)

7374

c)

1.79

d)

1.08E24

e)

3.36E23

18.

Convert 525 g of ZfCl₅ to moles.

(Zaepfelium is a new element your teacher discovered)

a)

2.61

b)

1.05E5

c)

0.383

d)

3.16E26

e)

1.57E24

19.

Convert 225 g of N₂Zf₅ to moles.

(Zaepfelium is a new element your teacher discovered)

a)

1.52

b)

3.34E4

c)

0.660

d)

1.35E26

e)

9.13E23

20.

Convert 45 g of Fe₃(ZfO₄)₂ to moles.

(Zaepfelium is a new element your teacher discovered)

a)

0.131

b)

1.55E4

c)

7.64

d)

2.71E25

e)

7.88E22

21.

Convert 25 g of As₂Pe₃ to moles.

(Peeyew is a fictional element found on the dwarf planet Pluto)

a)

0.0993

b)

6.29E3

c)

10.07

d)

1.51E25

e)

5.98E22

22.

Convert 375 g of CPe₄ to moles.

(Peeyew is a fictional element found on the dwarf planet Pluto)

a)

2.53

b)

5.55E4

c)

0.395

d)

2.26E26

e)

1.53E24

23.

How many grams of NH₃ is 0.85 moles of NH₃?

a)

14.5

b)

0.499

c)

20.04

d)

5.12E23

e)

3.00E22

24.

How many grams of NaCl is 1.28 moles of NaCl?

a)

74.8

b)

0.0219

c)

45.66

d)

7.71E23

e)

1.32E22

25.

Convert 2.71 moles of Zf₂(SO₄)₃ to grams of Zf₂(SO₄)₃.

a)

911.4

b)

0.00806

c)

124.1

d)

1.63E24

e)

4.85E21

26.

Convert 0.235 moles of C₉H₈Zf₄ to grams of C₉H₈Zf₄.

a)

49.9

b)

0.00111

c)

903.8

d)

1.41E23

e)

6.67E20

27.

Convert 10.5 moles of CH₂Pe₂ to grams of CH₂Pe₂.

(Peeyew is a fictional element)

a)

861

b)

0.128

c)

7.81

d)

6.32E24

e)

7.71E22

28.

Convert 0.164 moles of CH₃Pe to grams of CH₃Pe.

(Peeyew is a fictional element)

a)

8.04

b)

0.00335

c)

299

d)

9.87E22

e)

2.01E21

29.

A batch of cookies calls for 1 cup of sugar. How many molecules of sugar are in 1 cup?

1 cup sugar = 200 grams

sugar = C₁₂H₂₂O₁₁

(Round to 3 significant figures, and type your answer in scientific notation using an E)

(a)

30.

A batch of cookies calls for 1 TBS of salt. How many molecules of salt are in 1 TBS?

1 TBS salt = 17.07 grams

salt = NaCl

(Round to 3 significant figures, and type your answer in scientific notation using an E)

(a)

31.

As of October 2023, there are about 8.045 billion people on planet Earth (8.045 x 10⁹). How many moles of people is that?

(Round your answer to 3 significant figures and type your answer in scientific notation using an E)

(a)

32.

A study published by the Proceedings of the National Academy of Science in 2022 says there are about 20 quadrillion ants worldwide (2.0 x 10¹⁶). How many moles of ants is that?

(Round your answer to 3 significant figures and type your answer in scientific notation using an E)

(a)

33.

What is the percent composition of CaCl₂?

% Ca = (a)

% Cl = (b)

Choose from the below words

36.11%

63.89%

31.94%

68.06%

72.86%

27.14%

34.

What is the percent composition of CH₂F₂?

% C = (a)

% H = (b)

% F = (c)

Choose from the below words

23.08%

3.87%

31.94%

68.06%

72.86%

27.14%

73.04%

5.73%

19.64%

35.

What is the percent composition of C₆H₁₂O₆?

% C = (a)

% H = (b)

% O = (c)

Choose from the below words

40.00%

6.71%

31.94%

68.06%

72.86%

27.14%

53.29%

5.73%

19.64%

36.

What is the percent composition of Mg₃(PO₄)₂?

% Mg = (a)

% P = (b)

% O = (c)

Choose from the below words

27.74%

23.56%

31.94%

68.06%

72.86%

24.35%

48.70%

5.73%

19.64%

11.78%

37.

What is the percent composition of an ore which contains 1.85 g of aluminum and 1.65 g of oxygen?

% Al = (a)

% O = (b)

Choose from the below words

31.94%

68.06%

72.86%

24.35%

5.73%

19.64%

11.78%

52.86%

47.14%

38.

A compound of silver contains 4.35 g of that metal combined with 0.65 g of sulfur. What is the percent composition of this compound?

% Ag = (a)

% S = (b)

Choose from the below words

68.00%

76.00%

89.00%

24.00%

32.00%

11.00%

87.00%

13.00%

5.00%

95.00%

39.

What is the empirical formula (simplest whole number ratio) for this compound?

80.0% C

20.0% H

a)

CH3

b)

CH

c)

CH2

d)

C2H

e)

C4H

40.

What is the empirical formula (simplest whole number ratio) for this compound?

71.5% Ca

28.5% O

a)

CaO

b)

CaO2

c)

Ca2O

d)

Ca3O

e)

CaO3

41.

What is the empirical formula (simplest whole number ratio) for this compound?

82.2% N

17.8% H

a)

NH3

b)

NH2

c)

NH

d)

N2H

e)

N3H

42.

What is the empirical formula (simplest whole number ratio) for this compound?

85.7% C

14.3% H

a)

CH2

b)

CH

c)

CH3

d)

C2H

e)

C4H

43.

What is the empirical formula (simplest whole number ratio) for this compound?

23.5% potassium

76.5% iodine

a)

KI

b)

KI2

c)

K2I

d)

KI3

e)

K3I

44.

An oxide of arsenic contains 3.26 g of arsenic and 1.04 g of oxygen. What is the empirical formula (simplest whole number ratio) for this oxide?

a)

As2O3

b)

AsO

c)

As2O

d)

AsO2

e)

As3O2

45.

A compound has the following percentage composition:

26.7% C

2.2% H

71.1% O

The molecular mass of this compound is 135.0 g/mol. What is this compound's true formula?

a)

C2H2O4

b)

CHO2

c)

C3H3O6

d)

CHO

e)

C2HO2

46.

A certain compound was analyzed and found to have the following composition:
54.6% carbon
9.0% hydrogen
36.4% oxygen
The true molecular weight for the compound is 176 g/mol. What is the molecular formula of the compound?

a)

C2H4O

b)

C4H8O2

c)

C6H12O3

d)

C8H16O4

e)

CH2O

47.

Analysis of a compound shows that it consists of:
24.3% carbon
4.1% hydrogen
71.6% chlorine
The molecular weight of the compound is determined to be 98.9 g/mol. What molecular formula corresponds to these data?

a)

CH2Cl

b)

C2H4Cl2

c)

CH2Cl2

d)

C2H3Cl

e)

C3H6Cl3

48.

A compound has the empirical formula of C₂H₈N and a molar mass of 46 g/mol. What is the molecular formula of this compound?

a)

C₂H₈N

b)

C₄H₁₆N₂

c)

CH₄N

d)

C₆H₂₄N₃

49.

A compound has the empirical formula of C₂H₈N and a molar mass of 92 g/mol. What is the molecular formula of this compound?

a)

C₂H₈N

b)

C₄H₁₆N₂

c)

CH₄N

d)

C₆H₂₄N₃

50.

Find the molecular formula of a compound with percent composition of:

26.7% P

12.1% N

61.2% Cl

This compound has a molar mass of 695 g/mol

a)

PNCl

b)

P₂N₂Cl₄

c)

P₆N₆Cl₁₂

d)

P₃N₃Cl₆

e)

P₅N₅Cl₁₀

51.

Find the molecular formula of a compound with percent composition of:

26.7% P

12.1% N

61.2% Cl

This compound has a molar mass of 579.4 g/mol

a)

PNCl

b)

P₂N₂Cl₄

c)

P₆N₆Cl₁₂

d)

P₃N₃Cl₆

e)

P₅N₅Cl₁₀

52.

What is the molarity, M, of 0.356 mols of NaCl in 0.219 L of solution?

a)

1.63 M

b)

0.078 M

c)

0.615 M

d)

95.0 M

53.

What is the molarity of a 0.450 L salt solution that was made with 25.7 g of NaCl?

a)

0.977 M

b)

0.198 M

c)

1.023 M

d)

57.11 M

e)

0.4398 M

54.

A CaCl2 solution was made by dissolving 125 g CaCl₂ in enough water to make 1.25 L of solution. What is the Molarity (mol/L) of this solution?

a)

0.901 M

b)

2.8 M

c)

0.56 M

d)

200 M

e)

110 M

55.

A 1.25 L solution of CaCl₂ has a Molarity of 0.901 M. How many grams of CaCl2 was used to make this solution?

a)

125 g

b)

1.41 g

c)

1.11 g

d)

100 g

e)

110 g

56.

A 1.25 L solution of CaCl₂ has a Molarity of 0.901 M. How many moles of CaCl2 was used to make this solution?

a)

125 mol

b)

1.41 mol

c)

1.13 mol

d)

100 mol

e)

110 mol

57.

32.7 g of NaNO₃ was dissolved in enough water to make a 0.250 L solution. What is the molarity (mol/L) of this solution?

a)

0.385 M

b)

1.54 M

c)

0.096 M

d)

0.650 M

e)

130.8 M

58.

0.385 mols of NaNO₃ was dissolved in enough water to make a 0.250 L solution. What is the molarity (mol/L) of this solution?

a)

32.7 M

b)

1.54 M

c)

0.096 M

d)

0.650 M

e)

130.8 M

59.

A solution was made with 0.461 mols of an ionic compound dissolved in enough water to make 300 mL. What is the Molarity (mol/L) of this solution?

a)

1.54 M

b)

0.138 M

c)

0.651 M

d)

1.18 M

60.

A solution was made with 0.118 mols of an ionic compound dissolved in enough water to make 400 mL. What is the Molarity (mol/L) of this solution?

a)

0.295 M

b)

0.047 M

c)

3.39 M

d)

0.370 M

61.

MgCl₂ → Mg²⁺ + 2Cl^-

If you had 1 mole of MgCl₂ completely dissolve in water according to the reaction above, how many moles of Mg²⁺ions would be in solution?

a)

1

b)

2

c)

3

d)

4

e)

5

62.

MgCl₂ → Mg²⁺ + 2Cl^-

If you had 1 mole of MgCl₂ completely dissolve in water according to the reaction above, how many moles of Cl^-ions would be in the solution?

a)

1

b)

2

c)

3

d)

4

e)

5

63.

CaCl₂ → Ca²⁺ + 2Cl^-

If you had 1 mole of CaCl₂ completely dissolve in water according to the reaction above, how many moles of Cl^-ions would be in the solution?

a)

1

b)

2

c)

3

d)

4

e)

5

64.

CaCl₂ → Ca²⁺ + 2Cl^-

If you had 1 mole of CaCl₂ completely dissolve in water according to the reaction above, how many moles of Ca²⁺ions would be in the solution?

a)

1

b)

2

c)

3

d)

4

e)

5

65.

Mg(NO₃)₂ → Mg²⁺ + 2NO₃^-

If you had 1 mole of Mg(NO₃)₂ completely dissolve in water according to the reaction above, how many moles of Mg²⁺ions would be in the solution?

a)

1

b)

2

c)

3

d)

4

e)

5

66.

Mg(NO₃)₂ → Mg²⁺ + 2NO₃^-

If you had 1 mole of Mg(NO₃)₂ completely dissolve in water according to the reaction above, how many moles of NO₃^-ions would be in the solution?

a)

1

b)

2

c)

3

d)

4

e)

5

67.

KNO₃ → K⁺ + NO₃^-

If you had 1 mole of KNO₃ completely dissolve in water according to the reaction above, how many moles of NO₃^-ions would be in the solution?

a)

1

b)

2

c)

3

d)

4

e)

5

68.

KNO₃ → K⁺ + NO₃^-

If you had 2 moles of KNO₃ completely dissolve in water according to the reaction above, how many moles of K⁺ions would be in the solution?

a)

1

b)

2

c)

3

d)

4

e)

5

69.

KNO₃ → K⁺ + NO₃^-

If you had 3 moles of KNO₃ completely dissolve in water according to the reaction above, how many moles of K⁺ions would be in the solution?

(a)

70.

K₂SO₄ → 2K⁺ + SO₄^2-

If you had 2 moles of K₂SO₄ completely dissolve in water according to the reaction above, how many moles of K⁺ions would be in the solution?

(a)

71.

K₂SO₄ → 2K⁺ + SO₄^2-

If you had 3 moles of K₂SO₄ completely dissolve in water according to the reaction above, how many moles of SO₄^2-ions would be in the solution?

(a)

72.

K₂SO₄ completely dissolves in water. Writing the charges on the ions in parenthesis, write the dissolution reaction below:

(a) → (b) + (c)

Choose from the below words

K2SO4

2K(+)

SO4(2-)

K(2+)

SO4(-)

2SO4(-)

KSO4

K(+)

2SO4(2-)

73.

NaNO₃ completely dissolves in water. Writing the charges on the ions in parenthesis, write the dissolution reaction below:

(a) → (b) + (c)

Choose from the below words

NaNO3

Na(+)

NO3(-)

Na(2+)

2NO3(-)

NO3(2-)

Na(NO3)2

2Na(+)

2NO3(2-)

74.

SrCl₂→ Sr²⁺ + 2Cl^-

SrCl₂ dissolves in water according to the reaction above. If 1.5 moles of SrCl2 dissolved in 0.48 L of solution, what is the molarity of Sr²⁺ ions in the solution? (Molarity = mol/L)

a)

3.125

b)

1.5

c)

3.00

d)

6.25

75.

SrCl₂→ Sr²⁺ + 2Cl^-

SrCl₂ dissolves in water according to the reaction above. If 1.5 moles of SrCl2 dissolved in 0.48 L of solution, what is the molarity of Cl^- ions in the solution? (Molarity = mol/L)

a)

3.125

b)

1.5

c)

3.00

d)

6.25

76.

Mg₃(PO₄)₂ dissolves in water according to the reaction below. What are the coefficients of the ions?

Mg₃(PO₄)₂→ (a) Mg²⁺+ (b) PO₄^3-

Choose from the below words

3

2

1

4

5

6

77.

Ca₃(PO₄)₂ dissolves in water according to the reaction below. What are the coefficients of the ions?

Ca₃(PO₄)₂→ (a) Ca²⁺+ (b) PO₄^3-

Choose from the below words

3

2

1

4

5

6

78.

Al₂(SO₄)₃ dissolves in water according to the reaction below. What are the coefficients of the ions?

Al₂(SO₄)₃→ (a) Al³⁺+ (b) SO₄^2-

Choose from the below words

3

2

1

4

5

6

79.

Sr(NO₃)₂ dissolves in water according to the reaction below. What are the coefficients of the ions?

Sr(NO₃)₂→ (a) Sr²⁺+ (b) NO₃^-

Choose from the below words

3

2

1

4

5

6

80.

If 1.5 moles of K₃PO₄ is dissolved in solution, how many moles of K⁺ ions are in the solution?

(a)

81.

If 3.5 moles of K₃PO₄ is dissolved in solution, how many moles of K⁺ ions are in the solution?

(a)

82.

If 3.5 moles of K₃PO₄ is dissolved in solution, how many moles of PO₄^3- ions are in the solution?

(a)

83.

If 1.25 moles of MgCl₂ is dissolved in solution, how many moles of Mg²⁺ ions are in the solution?

(a)

84.

If 1.25 moles of MgCl₂ is dissolved in solution, how many moles of Cl^- ions are in the solution?

(a)

85.

When 25.0 mL of a 0.50M solution is diluted to 50.0 mL, what is the molarity of the final solution?

a)

0.25 M

b)

625 M

c)

2500 M

d)

1.0 M

e)

0.50 M

86.

When 15.0 mL of a 0.35M solution is diluted to 100.0 mL, what is the molarity of the final solution?

a)

0.0525 M

b)

525 M

c)

2.33 M

d)

4285.7 M

e)

15 M

87.

A large bottle of a solution of concentrated hydrochloric acid, HCl, was purchased for the general chemistry lab. A 1.0 M solution was made by diluting 5.00 mL of the concentrated solution to 60.0 mL. What was the concentration of the original large bottle of HCl?

a)

12.0 M

b)

144 M

c)

3600 M

d)

25.0 M

e)

0.04 M

88.

A large bottle of a solution of concentrated nitric acid, HNO₃, was purchased for the general chemistry lab. A 2.2 M solution was made by diluting 15.0 mL of the concentrated solution to 75 mL. What was the concentration of the original large bottle of HNO₃?

a)

11.0 M

b)

314.6 M

c)

2.60 M

d)

1.8 M

89.

A lab calls for 50.0 mL of 1.5 M NaOH solution. The stock room only has a large bottle of 5.0 M NaOH. How much of the 5.0 M solution should you use to make exactly 50.0 mL of 1.5 M of NaOH?

a)

15.0 mL

b)

112.5 mL

c)

4.50 mL

d)

0.50 mL

90.

What is the concentration in parts per million (ppm) of selenium, Se, if 1.3 milligrams is found in 2500 kg of soil?

a)

5.2 x 10^-4

b)

2.5 x 10^-4

c)

1.3 x 10^-5

d)

3.25 x 10^-3

91.

What is the concentration in parts per billion (ppb) of selenium, Se, if 4.5 x 10^-3 grams is found in 1.8 x 10⁶ grams of soil?

a)

5.2

b)

2.5

c)

2.5 x 10^-3

d)

3.25 x 10^-3

92.

A glass of water (250 g) has a lead concentration of 11 ppb, how many grams of lead is in the glass of water?

a)

2.75 x 10^-6g

b)

2.75 x 10^-3g

c)

2.75 x 10^-9g

d)

2.75 x 10^-12g

93.

A large cup of water (500 g) has 4.6 x 10^-5 g of lead in it. What is the concentration of lead in ppm? (a)

What is the concentration of lead in ppb? (b)

Choose from the below words

0.092

92

9.2

0.92

0.0092

1.08

0.108

10.8

108

0.0108

94.

A large cup of water (500 g) has 4.6 x 10^-5 g of lead in it. What is the concentration of lead in ppm? (a)

What is the concentration of lead in ppb? (b)

Choose from the below words

0.092

92

9.2

0.92

0.0092

1.08

0.108

10.8

108

0.0108

95.

A cup of water (350 g) has 2.22 x 10^-6 g of arsenic in it. What is the concentration of arsenic in ppm? (a)

What is the concentration of arsenic in ppb? (b)

Choose from the below words

0.0063

63

630

0.063

1.57

0.157

15.7

157

0.0157

6.3

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