Mole ConceptHard
Question
A volume of 50 ml of a gas mixed with 70 ml of oxygen gave after explosion 50 ml of CO2 and after absorption by KOH, 45 ml of oxygen are left. What is the molecular formula of the gas?
Options
A.CH4
B.C2H4
C.CO
D.C2H2
Solution
O2 consumed = 70 – 45 = 25 mL
For any hydrocarbon, volume of O2 used in combustion must be greater than the volume of hydrocarbon.
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