Percent composition and Empirical formulas
Chemistry
10th - 12th Grade
NGSS covered
Used 108+ times
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29 questions
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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%
Tags
NGSS.HS-PS1-7
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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