Question

CO2 is prepared by the two human actions as
Case1: By burning carbon in presence of
02, C + O2 + CO2 1
Case2: By thermal decomposition of
CaCO3, CaCO3 + CaO+CO2
Then from these two cases CO2 is formed by
following one of the following laws.
А
Law conservation of mass
B
Law of constant proportions
С
Law of definite proportions
Both B and C​

Answer 1

Answer:

A)law of conservation of mass.