If isobutane and n-butane are present in a gas, then how much oxygen should be required for complete combustion of 5 kg of this gas

Options

A. 17.9 kg
B. 9 kg
C. 27 kg
D. 1.8 kg

Answer

A

Explanation

Isobutane and n-butane `[C_(4)H_(10)]` have same molecular formula , `C_(4)H_(10) + (13)/(2) O_(2) to 4CO_(2) + 5H_(2)O`
For 58g of `C_(4)H_(10)` 208 g `O_(2)` Is required then for 5 kg of `C_(4)H_(10) O_(2) = (5 xx 208)/(58) = 17.9` kg