State which of the following are better fertilizers — (i) Potassium phosphate [K 3 PO 4 ] or potassium nitrate [KNO 3 ] (ii) Urea [NH 2 CONH 2 ] or ammonium phosphate [(NH 4 ) 3 PO 4 ] [K = 39, P = 31, O = 16, N = 14, H = 1]

(i) Molecular weight of K 3 PO 4 = 3(39) + 31 + 4(16) = 117 + 31 + 64 = 212 g Percentage of K in K 3 PO 4 = x 100 = 55.18% Molecular weight of [KNO 3 ] = 39 + 14 + 3(16) = 39 + 14 + 48 = 101 g Percentage of K in KNO 3 = x 100 = 38.61% Hence, potassium phosphate (% of K = 55.18 %) is better fertilizer than potassium nitrate (% of K = 38.61 %). (ii) Molecular weight of NH 2 CONH 2 = 14 + 2(1) + 12 + 16 + 14 + 2(1) = 14 + 2 + 12 + 16 + 14 + 2 = 60 g Percentage of N in NH 2 CONH 2 = x 100 = 46.67% Molecular weight of (NH 4 ) 3 PO 4 = 3[14 + 4(1)] + 31 + 4(16) = 54 + 31 + 64 = 149 g Percentage of N in (NH 4 ) 3 PO 4 = x 100 = 28.19% Hence, Urea is a better fertilizer as percentage of N in urea is 46.67% and in (NH 4 ) 3 PO 4 is 28.19 %

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Chemistry

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]

Stoichiometry

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Chemistry

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]

Stoichiometry

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[Cu = 63.5, S = 32, O = 16, H = 1]

Chemistry

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]

Stoichiometry

Related Questions

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]

Calculate the percentage of carbon in a 55% pure sample of carbon carbonate. [Ca = 40, C = 12, O = 16]

Calculate the percentage of water of crystallization in hydrated copper sulphate [CuSO4.5H2O].[Cu = 63.5, S = 32, O = 16, H = 1]

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]

Calculate the percentage of pure aluminium in 10 kg. of aluminium oxide [Al₂O₃] of 90% purity. [Al = 27, O = 16]

Calculate the percentage of water of crystallization in hydrated copper sulphate [CuSO₄.5H₂O].
[Cu = 63.5, S = 32, O = 16, H = 1]