Advertisements
Advertisements
प्रश्न
Calculate the percentage of phosphorus in calcium hydrogen phosphate Ca(H2PO4)2 .
Advertisements
उत्तर
Molar mass of Ca(H2PO4)2 is 2346/mole
Atomic mass of phosphorus is 31g
So percentage of phosphorus = `("atomic mass" xx 2)/("molar mass") xx 100`
= `(31 xx 2)/234 xx 100`
= `26.50%`
संबंधित प्रश्न
Calculate the percentage of nitrogen and oxygen in ammonium nitrate. [Relative molecular mass of ammonium nitrate is 80, H = 1, N = 14, O = 16].
Calculate the percentage composition of each element in Potassium chlorate KCIO3.
Urea is a very important nitrogenous fertilizer. Its formula is CON2H4. Calculate the percentage of carbon in urea. (C = 12, O = 16, N = 14 and H = 1)
Give three kinds of information conveyed by the formula H2O.
Find the empirical formula of the compounds with the following percentage composition:
Pb = 62.5%, N = 8.5%, O = 29.0%
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].
10 g of a mixture of sodium chloride and anhydrous sodium sulphate is dissolved in water. An excess of barium chloride solution is added and 6.99 g of barium sulphate is precipitated according to the equation given below:
\[\ce{Na2SO4 + BaCl2 -> BaSO4 + 2NaCl}\]
Calculate the percentage of sodium sulphate in the original mixture.
Find the percentage of nitrogen in ammonia.
A compound X contains 32% of A, 20% of B and remaining percentage of C. Then, the empirical formula of X is ______.
(Given atomic masses of A = 64; B = 40; C = 32
