Advertisements
Advertisements
Question
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
Solution
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
RELATED QUESTIONS
Calculate the percentage of phosphorus in calcium hydrogen phosphate Ca(H2PO4)2 .
Calculate the percentage of phosphorus in calcium phosphate Ca3(PO4)2.
Give three kinds of information conveyed by the formula H2O.
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%
Find the percentage of oxygen in magnesium nitrate crystals [Mg(NO3).6H2O].
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)
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]
