Question

1.5g of ethane on complete combustion gave 4.4g of carbon dioxide and 2.7g of water. show that the results are in accordance to the law of conservation of mass

Answer 1

yes, the result is in accordance to law of conservation of mass.

Answer 2

Answer:

Hydrocarbon undergoes combustion to form carbondioxide and water.

molecular mass of carbondioxide = 44gm

molecular mass of water  = 18 gm

mass of Carbon in 4.4 gm of carbondioxide = (12/44) * 4.4 = 1.2 gm

mass of Hydrogen in 2.7 gm of water = (2/18)*2.7 = 0.3 gm

So,

Total mass of Hydrogen and Carbon = (1.2 +.3)gm = 1.5 gm

This is the same mass before combustion.

Explanation:

So , the results are accordance with the law of conservation of mass.