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Molar Mass and Percent Composition

Authored by Lisa Thompson

Science

10th Grade

NGSS covered

Molar Mass and Percent Composition
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15 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is the mass percentage of Carbon in Carbon dioxide (CO2)?

27.27%

42.86%

72.73%

72.72%

Tags

NGSS.MS-PS1-5

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is the molar mass of fluorine gas, F2?

18.998 g/mol

38 g/mol

9 g/mol

18 g/mol

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is the definition of molar mass?

number of grams in one mole of a substance

whole number ratio that is a multiple of a chemical formula

simplest, whole number ratio of a chemical formula

6.02 x 10^23 particles per one mole of a substance

Tags

NGSS.HS-PS1-7

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is the molar mass of AuCl3?

96 g

130 g

232.5 g

303.3 g

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is the mass in grams of 5.90 mol C8H18?

.0512 g

19.4 g

673 g

389 g

6.

MULTIPLE CHOICE QUESTION

1 min • 5 pts

Find the molar masses of the following compounds:

303.3 g/mole

102.9 g/mole

74.1 g/mole

160.0 g/mole

96.0 g/mole

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The mass of one mole of substance is called...

molecular mass

mole constant

molar mass

atomic weight

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