
Empirical Formula Challenges
Authored by Carlet Jose Martinez
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11th Grade

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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the empirical formula of C6H12O6?
C2H4O2
C6H12O6
C3H6O3
CH2O
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Calculate the empirical formula for a compound with 40% carbon, 6.7% hydrogen, and 53.3% oxygen by mass.
C3H6O
C2H4O2
CH2O
C4H8O2
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
If a compound contains 2 moles of nitrogen and 6 moles of hydrogen, what is its empirical formula?
NH3
N3H6
NH2
N2H6
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Determine the empirical formula of a substance that is 75% carbon and 25% hydrogen by mass.
CH4
C2H2
CH2
C3H6
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A compound is composed of 60% sulfur and 40% oxygen. What is its empirical formula?
O2S
SO4
S2O
SO2
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the empirical formula for a compound with the molecular formula C8H16?
C2H4
CH2
C8H8
C4H8
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
If a sample contains 10g of sodium and 15g of chlorine, what is the empirical formula?
Na2Cl2
NaCl
NaCl2
NaCl3
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