Percent Comp

Percent Comp

10th - 12th Grade

29 Qs

quiz-placeholder

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Percent Comp

Percent Comp

Assessment

Quiz

Chemistry

10th - 12th Grade

Hard

Created by

Barbara White

FREE Resource

29 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

What is the percent by mass of magnesium in MgO?
20%
40%
50%
60%

2.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

What is the percent by mass of sodium in NaCl?
39%
61%
35%
65%

3.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

What is the percent by mass of chlorine in NaCl?
39%
61%
35%
65%

4.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

What is the percent composition by mass of sulfur in the compound MgSO4 (gram formula mass = 120 g/mol)?
20%
27%
46%
53%

5.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

What is the percent composition by mass of magnesium in the compound MgSO4 (gram formula mass = 120 g/mol)?
20%
27%
46%
53%

6.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

What is the percent by mass of oxygen in MgO?
20%
40%
50%
60%

7.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

What is the percent by mass of fluorine in CaF2 (gram-formula mass = 78 g/mol)?
24%
49%
51%
65%

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