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Earlier discussion
2 older comments kept for context.
Ebieride
20cm^3 of carbon dioxide has sparked with 20cm^3 of oxygen. If all the volume of gases are measured at stp calculate the volume of residual gas after sparking
Oluwaseun Adeyemi
2H2 + O2 ------2H2O
2V 1V 2V
20cm3 20cm3 -------
20cm3 10cm3 20cm3
Residual gas = 20cm3 - 10cm3 of 02 = 103