Question

During an investigation a scientist heated 27 g of mercuric oxide till it decomposed to leave a dry product. The total mass of the product formed was 25 g. Does the law of conservation of mass hold true in this case?

Answer 1

Yes.

Step-by-step explanation:

The law of conservation of mass holds true, because the mass missing is in gas form. The fact that matter can change, doesn't mean they violate this law of conservation.

So, this law is always happening.

Answer 2

The law of conservation holds true always so there the last two grams has be lost as a gas probably