Calculate the percentage of phosphorus in (a) Calcium hydrogen phosphate Ca(H 2 PO 4 ) 2 (b) Calcium phosphate Ca 3 (PO 4 ) 2

(a) Molecular mass of Ca(H 2 PO 4 ) 2 = Ca + 2[2H + P + 4O] = 40 + 2[2(1) + 31 + 4(16)] = 40 + 2[2 + 31 + 64] = 40 + 194 = 234 234 g of Ca(H 2 PO 4 ) 2 contains 62 g of P ∴ 100 g of Ca(H 2 PO 4 ) 2 contains = x 100 = 26.5% (b) Molecular mass of Ca 3 (PO 4 ) 2 = 3Ca + 2[P + 4O] = (3 x 40) + 2[31 + 4(16)] = 120 + 2[31 + 64] = 120 + 190 = 310 310 g of Ca 3 (PO 4 ) 2 contains 62 g of P ∴ 100 g of Ca 3 (PO 4 ) 2 contains = x 100 = 20 %

Give the empirical formula of:
(a) C₆H₆
(b) C₆H₁₈O₃
(c) C₂H₂
(d) CH₃COOH

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Find the percentage of water of crystallisation in CuSO₄.5H₂O. (At. Mass Cu = 64, H = 1, O = 16, S = 32)

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Calculate the percent composition of Potassium chlorate KClO₃.

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Find the empirical formula of the compounds with the following percentage composition:
Pb = 62.5%, N = 8.5%, O = 29.0%

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Chemistry

Calculate the percentage of phosphorus in
(a) Calcium hydrogen phosphate Ca(H₂PO₄)₂
(b) Calcium phosphate Ca₃(PO₄)₂

Mole Concept

Related Questions

Give the empirical formula of:
(a) C₆H₆
(b) C₆H₁₈O₃
(c) C₂H₂
(d) CH₃COOH

Find the percentage of water of crystallisation in CuSO₄.5H₂O. (At. Mass Cu = 64, H = 1, O = 16, S = 32)

Calculate the percent composition of Potassium chlorate KClO₃.

Find the empirical formula of the compounds with the following percentage composition:
Pb = 62.5%, N = 8.5%, O = 29.0%

Chemistry

Calculate the percentage of phosphorus in(a) Calcium hydrogen phosphate Ca(H2PO4)2(b) Calcium phosphate Ca3(PO4)2

Mole Concept

Related Questions

Give the empirical formula of:(a) C6H6(b) C6H18O3(c) C2H2(d) CH3COOH

Find the percentage of water of crystallisation in CuSO4.5H2O. (At. Mass Cu = 64, H = 1, O = 16, S = 32)

Calculate the percent composition of Potassium chlorate KClO3.

Find the empirical formula of the compounds with the following percentage composition:Pb = 62.5%, N = 8.5%, O = 29.0%

Calculate the percentage of phosphorus in
(a) Calcium hydrogen phosphate Ca(H₂PO₄)₂
(b) Calcium phosphate Ca₃(PO₄)₂

Give the empirical formula of:
(a) C₆H₆
(b) C₆H₁₈O₃
(c) C₂H₂
(d) CH₃COOH

Find the percentage of water of crystallisation in CuSO₄.5H₂O. (At. Mass Cu = 64, H = 1, O = 16, S = 32)

Calculate the percent composition of Potassium chlorate KClO₃.

Find the empirical formula of the compounds with the following percentage composition:
Pb = 62.5%, N = 8.5%, O = 29.0%