The reaction 2KClO3 → 2KCl + 3O2 explains the law
Law of conservation of mass
Definite proportion
Multiple proportion
Conservation of energy
The sum of masses of substances before and after a chemical reaction remains constant. This law is
Conservation of mass
Constant composition
Law of multiple proportions is illustrated by
H2S and SO2
NH3 and NO2
Na2S and Na2O
N2O and NO
In the formation of carbon monoxide and carbon dioxide, the weights of oxygen that combine with carbon in the ratio
1:1
1:2
1:4
1:6
Zn + CuSO4 → ZnSO4 + Cu. This reaction follows the law
Constant proportion
12 grams of carbon combines with 32 grams of oxygen to form CO2
42 g
44 g
46 g
48 g
The quantitative aspects of chemical changes are governed by certain laws called
Law of chemical combination
Law of conservation of energy
Law of energetics
None of these
Carbon and oxygen combine to form carbon monoxide and carbon dioxide explains the law
John Dalton proposed the law
CaO + H2O → Ca(OH)2 . This reaction explains