The mass of the product is equal to the total mass of the reactants. This is:
Law of conservation of mass
Law of constant proportion
Law of relative mass
Law of reciprocal proportion
The relative atomic mass (Ar) of chlorine is:
64
12
35.5
27
The relative formula mass of calcium carbonate is:
80
44
246
100
Elements combined in fixed amounts to form:
Solution
Compounds
Mixture
Salt
The average mass of the naturally occurring atoms of the element, using a scale where an atom of carbon-12 has a mass of exactly 12.
Atomic mass
Molecular mass
Gram atomic mass
Relative atomic mass
Avogadro constant is:
6.02 × 1023
6.02 × 1028
7.1 × 10-31
6.02
Hydrated copper sulphate crystal is:
CaSO4 .H2O
CaSO4. 4H2O
CuSO4.5H2O
CuSO4
The relative formula mass of NaCl is:
35. 5
58.5
18
The relative atomic mass of water is:
2
The mass of one hydrogen atom is:
1. 6 ×-10-31
1.7 × 10-24
6. 1 × 1023
2.1 × 10-28
