(a) Molecular weight of carbon dioxide CO2 = 12 + (2 × 16) = 12...
Percentage Composition
Question Category: Percentage Composition
Calculate the percentage of iron in K3Fe(CN)6. [K = 39,
Molecular weight of K3Fe(CN)6 = 3(39) + 56 + 6(12 + 14) = 117 + 56...
Calculate which of the following — calcium nitrate or ammonium
Molecular weight of calcium nitrate Ca[NO3]2 = 40 + 2[(14 + 3(16))] = 40 + 2[14...
Calculate the percentage of pure aluminium in 10 kg. of
90% of 10 kg = 9000 g Molecular weight of aluminium oxide [Al2O3] = 2(27)...
State which of the following are better fertilizers —
(i) Molecular weight of K3PO4 = 3(39) + 31 + 4(16) = 117 + 31 +...
Calculate the percentage of carbon in a 55% pure sample
Molecular weight of CaCO3 = 40 + 12 + 3(16) = 40 + 12 + 48...
Calculate the percentage of water of crystallization in hydrated copper
Molecular weight of hydrated copper sulphate CuSO4.5H2O = 63.5 + 32 + 4(16) + 5[2(1)...
Hydrated calcium sulphate [CaSO4.xH2O] contains 21% of water of crystallization.
CaSO4.xH2O contains 21% of water of crystallization, so % of CaSO4 = 100 – 21...
A compound gave the following data : C = 57.82%,
Element % composition At. wt. Relative no. of atoms Simplest ratio Carbon 57.82 12 57.12/12...
Four g of a metallic chloride contains 1.89 g of
4 g of metallic chloride contains 1.89 g of metal X ∴ 100 g of...