Finding Percent Composition in Chemistry

Finding Percent Composition in Chemistry

10th - 11th Grade

20 Qs

quiz-placeholder

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Finding Percent Composition in Chemistry

Finding Percent Composition in Chemistry

Assessment

Quiz

Chemistry

10th - 11th Grade

Hard

NGSS
HS-PS1-7, MS-PS1-1

Standards-aligned

Created by

Charles Martinez

FREE Resource

20 questions

Show all answers

1.

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%

2.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

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

3.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

In which compound is the percent composition by mass of Cl equal to 42%?
HClO (gram formula mass = 52 g/mol)
HClO2 (gram formula mass = 68 g/mol)
HClO3 (gram formula mass = 84 g/mol)
HClO4 (gram formula mass = 100 g/mol)

4.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

What is the percent composition of Benzene, C6H6?
C = 50%
H = 50%
C = 85.7 %
H = 14.3%
C = 92.2%
H = 7.8%
C = 71.9%
H = 28.1%

5.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

What is the percent composition of aluminum phosphate?
Al = 25%
P = 25%
O = 75%
Al = 22.1%
P = 35.8%
O = 42.1%
Al = 14.3%
P = 25.4%
O = 60.3%
Al = 22.1%
P = 25.4%
O = 52.5%

6.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

What percent of Zn3(PO4)2 is zinc?

33.15%

16.04%

50.80%

19.68%

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the percent composition of a compound that contains 40.8 g carbon and 54.4 g oxygen?

42.9 %; 57.1% oxygen

52.9 %; 57.1% oxygen

42.9 %; 45.23% oxygen

55.9 %; 99.1% oxygen

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