Question

3 g of a hydrocarbon on combustion in excess of oxygen produces 8.8 g of $C{O}_2$ and 5.4 g of $H_{2}O$.

The data illustrates the law of :

• A. Conservation of mass
• B. Multiple proportions
• C. Constant proportions
• D. None of the above

Answer 1

The correct option is A Conservation of mass

Mass of carbon in 8.8 g $C{O}_2=\frac{12}{44}\times 8.8=2.4g$

Mass of hydrogen in 5.4 g $H_{2}O=\frac{2}{18}\times 5.4=0.6g$

Total mass $(C+H)=2.4+0.6=3.0g$

Mass of hydrocarbon = 3.0 g (given)

These data illustrate the law of conservation of mass.

Option (A) is correct.