Advertisements
Advertisements
प्रश्न
Calculate the percentage of phosphorus in calcium hydrogen phosphate Ca(H2PO4)2 .
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%`
APPEARS IN
संबंधित प्रश्न
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 of nitrogen and oxygen in ammonium nitrate. [Relative molecular mass of ammonium nitrate is 80, H = 1, N = 14, O = 16].
Calculate the percentage of phosphorus in calcium phosphate Ca3(PO4)2.
Calculate the percentage composition of each element in Potassium chlorate KCIO3.
Give three kinds of information conveyed by the formula H2O.
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.
1 g of a mixture of sodium chloride and sodium nitrate is dissolved in water. On adding silver nitrate solution, 1.435 g of AgCl is precipitated.
\[\ce{AgNO3_{( aq)} + NaCl_{( aq)}-> AgCl_{(s)} + NaNO3}\]
Calculate the precentage of NaCl in the mixture.
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.
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)
Calculate the percentage composition of calcium chloride.
Find the percentage of nitrogen in ammonia.
Empirical formula of Ethyne.
Find the total percentage of Magnesium in magnesium nitrate crystals, Mg(NO3)2.6H2O.
[Mg = 24, N = 14, O = 16 and H = 1]
