Multiple Choice
What is the empirical formula of a compound that contains only iron and oxygen and is 22.27% oxygen by mass?
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3. Chemical Reactions
Empirical Formula
Multiple Choice
What is the empirical formula for glucose?
A
CH2O
B
C2H4O2
C
C6H12O6
D
C3H6O3
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Verified step by step guidance1
Identify the molecular formula of glucose, which is given as C6H12O6.
Determine the ratio of atoms of each element in the molecular formula: Carbon (C) = 6, Hydrogen (H) = 12, Oxygen (O) = 6.
Find the greatest common divisor (GCD) of the subscripts 6, 12, and 6, which is 6.
Divide each subscript in the molecular formula by the GCD to simplify the ratio: C: 6/6 = 1, H: 12/6 = 2, O: 6/6 = 1.
Write the empirical formula using the simplified ratio of atoms: CH2O.
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