When `4.2 g NaHCO_(3)` is added to a solution of `CH_(3)COOH` (acetic acid) weighing `10 g`, it is observed that `2.2 g`of `CO_(2)` is released to the atmosphere. The residue is found to weigh `12.0 g`. Show that these observations are in agreement with the law of conservation of mass.

Explanation

`underset(4.2g)(NaHCO_(3))+underset(10.0g)(CH_(3)COOH)rarrunderset("Residue = 12.0 g")(ubrace(CH_(3)COONa+H_(2)))+underset(2.2g)(CO_(2))uarr`
`"Total mass of reactants = 4.2 + 10.2 g = 14.2 g"`
`"Total mass of products"= 12.0 +2.2g=14.2g`