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A compound is 40% C, 6.7% H and 53.3% O by mass. What is its empirical formula?
ACH2O
BC2H4O
CC2H2O
DCHO
Answer & Solution
Correct answer: A. CH2O
Moles are about 3.33 C, 6.7 H and 3.33 O, giving a ratio of 1 : 2 : 1, so CH2O.
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