Question

If $100$ grams of calcium carbonate (whether in the form of marble or chalk ) are decomposed completely, then $56$ grams of calcium oxide and $44$ grams of carbon dioxide are obtained. Which law of chemical combination is illustrated by this statement?

Answer 1

This reaction illustrates the law of conservation of mass i.e.mass before the decomposition is the same as mass after the decomposition $(i.e.56+44=100g)$