Calculate the relative molecular mass of Limestone CaCO3,...
Calculate the relative molecular mass of Limestone CaCO3, (Ca = 40, C =12, O = 16)
56
100
76
90
Correct answer is B
One molecule of CaCO has 1Ca, 1C and 30 atom relative molecular mass of CaCO3
1 × Ar of Ca +1 × Ar of C +3 × Ar of O
(1 × 40 + 1 × 12 + 3 × 1)
40 + 12 + 48
=100
Option A,C and D will not give 100
The mass number of a nucleus is? ...
An example of oxidation - reduction enzyme is ...
N2(g) + 3H2(g) ↔ 2NH3(g) ΔH = -90 kJ In the equation above, the yield of ammonia can be decrease...
What is the atomic number of Meitnerium? ...
What is the chemical symbol for Seaborgium? ...
How many bonding pair are present in carbon(iv)oxide? ...
The following compounds decolorize acidified potassium tetraoxomanganate (VII) solution EXCEPT ...