
10ADV Moles, Percent composition, Empirical Formula
Authored by Varma Kds
Chemistry
10th Grade
20 Questions
Used 3+ times

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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What percentage of the total atomic mass of magnesium bromide (MgBr2) is composed of magnesium?
13%
43%
63%
87%
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What percentage of the total atomic mass of lithium phosphide (Li3P) is composed of phosphorus?
13%
29%
40%
60%
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
What is the percent by mass of magnesium in MgO?
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
What is the molar mass of table salt (NaCl)?
5.
MULTIPLE CHOICE QUESTION
2 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
2 mins • 1 pt
Calculate the molar mass of NH4NO2
50 g/mol
60 g/mol
64 g/mol
78 g/mol
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the empirical formula of a substance with the molecular formula C2H4?
C2H2
C2H2
C1H1
CH2
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