H2O Any hydrocarbon, on combustion gives CO2 and H2O. This is Liebig's method for estimation of ' C ' and ' H′ percentage. Mass of water formed =210g 18g of H2O contains =2g of hydrogen 210g of H2O contains =(
2
18
×210=
70
3
)g of hydrogen. Given, mass of organic compound =750g Percentage of hydrogen =