Advertisements
Advertisements
प्रश्न
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)
Advertisements
उत्तर
The formula of urea is NH2CONH2 i.e CON2H4
Molar mass = 60 g/mol
Atomic mass of C = 12 & number of atoms = 1
∴ Percentage of carbon in urea = `12/60 xx 100` = 20%
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].
Give three kinds of information conveyed by the formula H2O.
Find the percentage of water of crystallisation in CuSO4.5H2O. (At. Mass Cu = 64, H = 1, O = 16, S = 32)
Calculate the percentage of phosphorus in Calcium phosphate Ca3(PO4)2
Find the empirical formula of the compounds with the following percentage composition:
Pb = 62.5%, N = 8.5%, O = 29.0%
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).
Find the percentage of boron in Na2B4O7.10H2O. [H = 1, B = 11, O = 16, Na = 23].
Calculate the percentage of sodium in sodium aluminium fluoride (Na3AlF6) correct to the nearest whole number. (F = 19; Na = 23; Al = 27)
Find the total percentage of Magnesium in magnesium nitrate crystals, Mg(NO3)2.6H2O.
[Mg = 24, N = 14, O = 16 and H = 1]
