Question

Upon combustion, a compound containing only carbon and hydrogen produces 2.49 g CO2 and 0.763 g H2O . Find the empirical formula of the compound

Answer 1

CH2.

Step-by-step explanation:

The mass of C in the CO2 = 2.49 * 12/(12+32) = 0.6791 g

The mass of Hydrogen in the water = 2 * 1.008 / (2.016 + 16) = 0.1119 g.

Ratio of H to O is 0.1119/ 1.008 : 0.6791/12

= 0.111 : 0.0566

= 2 : 1

The empirical formula is CH2