Question

how many litre of oxygen at STP is required to burn 60g c6h6

Answer 1

62h6+7/2 O2-----> 2co2+3H2O

Molecular mass of ethane----C2h6=[2×12+6×1]=300

Molar mass ofC2H6=30g
30g ofethane needs3.5 moles of 02.1 mole of any gas occupies 22.4liters. 3.5 moles occupy---？

3.5×22.4
=78.4l
For 60g of ethane we need =（78.4/30×60=156.8l of oxygen.