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Problem
The relative formula mass of a gas is 56 and its empirical formula is
CH
2
\text{CH}_2
CH
2
. What is the molecular formula of the gas? a.
CH
2
\text{CH}_2
CH
2
b.
C
2
H
4
\text{C}_2\text{H}_4
C
2
H
4
c.
C
3
H
6
\text{C}_3\text{H}_6
C
3
H
6
d.
C
4
H
8
\text{C}_4\text{H}_8
C
4
H
8
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