Question 1

Calculate the molar mass of Water (

H_{2}O

), given that the atomic mass of Hydrogen (

H

) is 1 g/mol and the atomic mass of Oxygen (

O

) is 16 g/mol.

Accepted Answer

18 g/mol

Answer

33 g/mol

Answer

10 g/mol

Answer

17 g/mol

Question 2

What is the molar mass of Methane (

H_{2}O

), given that the atomic mass of Carbon (

H

) is 12 g/mol and Hydrogen (

O

) is 1 g/mol?

Accepted Answer

16 g/mol

Answer

52 g/mol

Answer

13 g/mol

Answer

48 g/mol

Question 3

What is the molar mass of Carbon Dioxide (

H_{2}O

) if the atomic mass of Carbon (

H

) is 12 g/mol and Oxygen (

O

) is 16 g/mol?

Accepted Answer

44 g/mol

Answer

32 g/mol

Answer

56 g/mol

Answer

28 g/mol

Question 4

Calculate the molar mass of Sodium Chloride (

H_{2}O

), given that the atomic mass of Sodium (

H

) is 23 g/mol and the atomic mass of Chlorine (

O

) is 35.5 g/mol.

Accepted Answer

58.5 g/mol

Answer

59.5 g/mol

Answer

81.5 g/mol

Answer

57.5 g/mol

Question 5

Calculate the molar mass of Magnesium Oxide (

H_{2}O

), given that the atomic mass of Magnesium (

H

) is 24 g/mol and the atomic mass of Oxygen (

O

) is 16 g/mol.

Accepted Answer

40 g/mol

Answer

8 g/mol

Answer

384 g/mol

Answer

44 g/mol

Question 6

Calculate the molar mass of Ammonia (

H_{2}O

), given that the atomic mass of Nitrogen (

H

) is 14 g/mol and the atomic mass of Hydrogen (

O

) is 1 g/mol.

Accepted Answer

17 g/mol

Answer

42 g/mol

Answer

15 g/mol

Answer

18 g/mol

Question 7

Calculate the molar mass of Calcium Carbonate (

H_{2}O

), given that the atomic mass of Calcium (

H

) is 40 g/mol, Carbon (

O

) is 12 g/mol, and Oxygen (

O

) is 16 g/mol.

Accepted Answer

100 g/mol

Answer

68 g/mol

Answer

84 g/mol

Answer

120 g/mol

Question 8

What is the molar mass of O2 gas, given that the atomic mass of Oxygen (

H_{2}O

) is 16 g/mol?

Accepted Answer

32 g/mol

Answer

8 g/mol

Answer

16 g/mol

Answer

48 g/mol

Question 9

What is the molar mass of Sulfuric Acid (

H_{2}O

), given that the atomic mass of Hydrogen (

H

) is 1 g/mol, Sulfur (

O

) is 32 g/mol, and Oxygen (

O

) is 16 g/mol?

Accepted Answer

98 g/mol

Answer

82 g/mol

Answer

102 g/mol

Answer

49 g/mol

Question 10

What is the molar mass of Glucose (

H_{2}O

) if the atomic mass of Carbon (

H

) is 12 g/mol, Hydrogen (

O

) is 1 g/mol, and Oxygen (

O

) is 16 g/mol?

Accepted Answer

180 g/mol

Answer

150 g/mol

Answer

24 g/mol

Answer

200 g/mol

Question 11

What is the molar mass of Sodium Chloride,

H_{2}O

? (Atomic masses:

H

g/mol,

O

g/mol)

Accepted Answer

58.44 g/mol

Answer

58.00 g/mol

Answer

57.44 g/mol

Answer

22.99 g/mol

Question 12

Calculate the molar mass of Magnesium Hydroxide,

H_{2}O

. (Atomic masses:

H

g/mol,

O

g/mol,

O

g/mol)

Accepted Answer

58.33 g/mol

Answer

57.32 g/mol

Answer

82.64 g/mol

Answer

41.32 g/mol

Question 13

Calculate the molar mass of Calcium Carbonate,

H_{2}O

. (Atomic masses:

H

g/mol,

O

g/mol,

O

g/mol)

Accepted Answer

100.09 g/mol

Answer

68.09 g/mol

Answer

116.09 g/mol

Answer

84.09 g/mol

Question 14

What is the molar mass of sulfuric acid,

H_{2}O

? (Atomic masses:

H

g/mol,

O

g/mol,

O

g/mol)

Accepted Answer

98.08 g/mol

Answer

49.07 g/mol

Answer

82.07 g/mol

Answer

97.07 g/mol

Question 15

What is the molar mass of Ammonia,

H_{2}O

? (Atomic masses:

H

g/mol,

O

g/mol)

Accepted Answer

17.04 g/mol

Answer

15.02 g/mol

Answer

45.03 g/mol

Answer

18.05 g/mol

Question 16

Calculate the molar mass of Glucose,

H_{2}O

. (Atomic masses:

H

g/mol,

O

g/mol,

O

g/mol)

Accepted Answer

180.18 g/mol

Answer

168.15 g/mol

Answer

174.12 g/mol

Answer

186.20 g/mol

Question 17

What is the molar mass of Magnesium Chloride,

H_{2}O

? (Atomic masses:

H

g/mol,

O

g/mol)

Accepted Answer

95.21 g/mol

Answer

119.52 g/mol

Answer

84.07 g/mol

Answer

59.76 g/mol

Question 18

The molar mass of a substance is defined as the mass in grams of one mole of that substance. What is the standard unit used to express molar mass?

Accepted Answer

g/mol

Answer

amu

Answer

kg

Answer

mol/g

Question 19

The molar mass of Nitrogen gas (

H_{2}O

) is required for a lab report. If the atomic mass of a single Nitrogen (N) atom is

H

g/mol, what is the molar mass of

O

?

Accepted Answer

28 g/mol

Answer

42 g/mol

Answer

7 g/mol

Answer

14 g/mol

Question 20

The atomic mass of Helium (

H_{2}O

) is

H

. How many moles are present in a

O

sample of Helium gas?

Accepted Answer

3.0 	ext{ moles}

Answer

3.0 	ext{ moles}

Answer

3.0 	ext{ moles}

Answer

3.0 	ext{ moles}

Question 21

The atomic mass of Magnesium (

H_{2}O

) is

H

and Oxygen (

O

) is

O

. What is the molar mass of Magnesium Oxide (

MgO

)?

Accepted Answer

3.0 	ext{ moles}

Answer

3.0 	ext{ moles}

Answer

3.0 	ext{ moles}

Answer

3.0 	ext{ moles}

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