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Molar Mass and Percent Composition

Authored by JOSE ENRIQUE GOMEZ

Chemistry

10th - 11th Grade

Used 5+ times

Molar Mass and Percent Composition
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15 questions

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1.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

What is the percent composition by mass of sulfur (S) in the compound MgSO4?

20.22%

19.85%

26.64%

28.64%

2.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

What is the molar mass of PbSO4

303.3 g/mol
294.7g/mol
163.8g/mol
372g/mol

3.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

What is the percent by mass of magnesium in MgO?

20%
40%
50%
60%

4.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

What is the percent by mass of sodium in NaCl?

39%
61%
35%
65%

5.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Find the percent composition of Cu in CuBr2 .   

28.45%
32.85%
17.78%
68.10%

6.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

What is the percent composition in NaOH of Na?

19.55%

57.7%

25%

76.45%

7.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

What is the molar mass of NaOH?

39.997 g/mol
38.989 g/mol
23.998 g/mol
57.004 g/mol

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