Chemistry
Calculate the percentage by weight of :
(a) C in carbon dioxide
(b) Na in sodium carbonate
(c) Al in aluminium nitride.
[C = 12, O = 16, H = 1, Na = 23, Al = 27, N = 14]
Related Questions
Calculate the percentage of iron in K3Fe(CN)6. [K = 39, Fe = 56, C = 12, N = 14]
Calculate which of the following — calcium nitrate or ammonium sulphate has a higher % of nitrogen. [Ca = 40, , O = 16, S = 32, N = 14]
Calculate the percentage of pure aluminium in 10 kg. of aluminium oxide [Al2O3] of 90% purity. [Al = 27, O = 16]
State which of the following are better fertilizers —
(i) Potassium phosphate [K3PO4] or potassium nitrate [KNO3]
(ii) Urea [NH2CONH2] or ammonium phosphate [(NH4)3PO4]
[K = 39, P = 31, O = 16, N = 14, H = 1]