Question

On complete combustion 0.30 g of an organic compound gave 0.20 g of carbon dioxide and 0.10 g of water. The percentage of carbon in the given organic compound is ______. (Nearest Integer)

Answer 1

The correct answer is 18
44g of CO2 contains 12g of carbon
0.20g of CO2 will contain x g
Therefore ,
$x = \frac{12 \times0.2}{44}=0.0545$
Percentage = $\frac{0.0545}{0.30}\times100$
= 18 %