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Molar mass, Percent comp & mole conversions

Authored by Antonio Gonzalez

Chemistry

10th - 12th Grade

NGSS covered

Used 24+ times

Molar mass, Percent comp & mole conversions
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15 questions

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1.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

The molar mass of an element is equal to its...

Atomic mass
Atomic number
Oxidation number
Valence electrons

2.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

What is the molar mass of table salt (NaCl)?

116.886 g/mol
35.453 g/mol
22.990 g/mol
58.443 g/mol

3.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

What is the mass of one mole of aluminum?

27 g
13 g
54 g
14 g

4.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Calculate the molar mass of Ba(C2H3O2)2

255.3 g/mol

237.3 g/mol

228.3 g/mol

196.3 g/mol

5.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Calculate the molar mass for Al(OH)3

78.0 g/mol

72 g/mol

28 g/mol

25 g/mol

6.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Carbon monoxide, a deadly gas, has a chemical formula of CO (one carbon atom with one oxygen atom). If you look at the total atomic mass of CO, does carbon or oxygen make up more of the mass?

carbon

oxygen

they are exactly the same

it is impossible to tell

Tags

NGSS.MS-PS1-1

7.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

What is the percent by mass of oxygen in MgO?

20%
40%
50%
60%

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