Essential Chemistry for IGCSE - Chemical Calculations (Section 3 - No. 15)
If the empirical formula is CH₂ and the relative molecular mass is 28, what is the molecular formula?
CH₂
C₂H₄
C₃H₆
C₄H₈
Explanation
The empirical formula has a mass of 14. 28/14 = 2. C₂H₄
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