Answer
$C_4H_8O_2$
Work Step by Step
Given: $C_2H_4O$, $88$g/mol.
Find mass of $C_2H_4O$
$= 44.052$ g/mol
Divide given molar mass.
88(g/mol)/44(g/mol) = 2
Multiply compound by 2 to get molecular formula
$C_4H_8O_2$
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