Empirical and Molecular Formulas
Authored by Eric Aronsen
Science
11th Grade
Used 19+ times
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8 questions
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1.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
A compound is found to contain 50.05 % sulfur and 49.95 % oxygen by weight. What is its empirical formula?
SO2
SO3
SO4
S2O3
2.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
A compound consists of 72.2% magnesium and 27.8% nitrogen by mass. What is the empirical formula?
MgN2
Mg2N
Mg2N3
Mg3N2
3.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Determine the empirical formula for a compound with 87.1% Ag and 12.9% S.
AgS2
Ag2S
Ag4S3
Ag3S5
4.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
The empirical formula of a substance is CH2O. Its molar mass is 180. What is the molecular formula?
C4H8O4
C2H4O2
C8H16O8
C6H12O6
5.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
A compound with an empirical formula of C4H4O and a molar mass of 136 grams per mole. What is the molecular formula of this compound?
C4H4O
C8H8O2
C12H12O4
C16H16O4
6.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
A compound with an empirical formula of CHN and a molar mass of 119 grams per mole. What the molecular formula of this compound?
C2H2N2
C3H3N3
C5H5N5
C7H7N7
7.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Epinephrine (adrenaline) is a hormone secreted into the bloodstream in times of stress. It contains 59.0% C, 7.15% H, 26.20% O, and 7.65% N and has a molar mass of 183 g/mol. What is its molecular formula? (Hint you need to find the empirical formula first, then the molecular formula...Use you step in your notes!!!)
C5H11N3O2
C9H13NO3
C7H9N2O
C8H12NO2
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