Two different oxides of a metal contain 20% and 27% oxygen by weight. This is in accordance with
Conservation of mass
Constant proportion
Multiple proportion
Definite proportion
12 grams of carbon combines with 32 grams of oxygen to form CO2
42 g
44 g
46 g
48 g
The reaction 2KClO3 → 2KCl + 3O2 explains the law
Law of conservation of mass
Conservation of energy
Law of multiple proportions is illustrated by
H2S and SO2
NH3 and NO2
Na2S and Na2O
N2O and NO
The sum of masses of substances before and after a chemical reaction remains constant. This law is
Constant composition
John Dalton proposed the law
CaO + H2O → Ca(OH)2 . This reaction explains
When two or more elements combine to form a compound, they combined in a fixed ratio of their weights. This law is
Definite proportions
Carbon and oxygen combine to form carbon monoxide and carbon dioxide explains the law
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
