Advertisements
Advertisements
Question
Calculate the percentage of phosphorus in calcium phosphate Ca3(PO4)2.
Advertisements
Solution
Molar mass of calcium phosphate = 310.17 g/mole
Atomic mass of phosphorus (P) = 31 g
% of Phosphorus = `[(2 xx 31)/(310.17)] xx 100`
= 19.98 %
APPEARS IN
RELATED QUESTIONS
Commercial sodium hydroxide weighing 30 g has some sodium chloride in it. The mixture on dissolving in water and subsequent treatment with excess silver nitrate solution formed a precipitate weighing 14.3 g. What is the percentage of sodium chloride in the commercial sample of sodium hydroxide? The equation for the reaction is
\[\ce{NaCl + AgNO3 -> AgCl + NaNO3}\]
[Relative molecular mass of NaCl = 58, AgCI = 143]
Calculate the percentage composition of each element in Potassium chlorate KCIO3.
Calculate the percentage of phosphorus in Calcium phosphate Ca3(PO4)2
Urea is a very important nitrogenous fertilizer. Its formula is CON2H4. Calculate the percentage of nitrogen in urea. (C = 12, O = 16, N = 14 and H = 1).
An acid of phosphorus has the following percentage composition; Phosphorus = 38.27%; hydrogen = 2.47%; oxygen = 59.26%. Find the empirical formula of the acid and its molecular formula, given that its relative molecular mass is 162.
Find the percentage of oxygen in magnesium nitrate crystals [Mg(NO3).6H2O].
Calculate the percentage of sodium in sodium aluminium fluoride (Na3AlF6) correct to the nearest whole number. (F = 19; Na = 23; Al = 27)
Calculate the percentage composition of calcium nitrate [Ca = 40 , Cl = 35.5 , N = 14 , O = 16]
60 g of a compound on analysis gave 24 g C, 4 g H and 32 g O. The empirical formula of the compound is ______.
Empirical formula of Ethyne.
