Advertisements
Advertisements
प्रश्न
Calculate the percentage of phosphorus in calcium phosphate Ca3(PO4)2.
Advertisements
उत्तर
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
संबंधित प्रश्न
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)
Some of the fertilizers are sodium nitrate NaNO3, ammonium sulphate (NH4)2SO4 and urea CO(NH2)2. Which of these contains the highest percentage of nitrogen?
Find the percentage of boron in Na2B4O7.10H2O. [H = 1, B = 11, O = 16, Na = 23].
Find the percentage of phosphorus in the fertilizer superphosphate Ca(H2PO4)2.
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.
A sample of ammonium nitrate when heated yields 8.96 litres of steam (measure at STP).
\[\ce{NH4NO3 -> N2O + 2H2O}\]
- What volume of dinitrogen oxide is produced at the same time as 8.96 litres of steam?
- What mass of ammonium nitrate should be heated to produce 8.96 litres of steam? (Relative molecular mass of ammonium nitrate is 80).
- Determine the percentage of oxygen in ammonium nitrate (O = 16).
Calculate the percentage of sodium in sodium aluminium fluoride (Na3AlF6) correct to the nearest whole number. (F = 19; Na = 23; Al = 27)
State the term for the following:
The formula which represents the simplest ratio between the atoms of elements present in a compound.
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
