Advertisements
Advertisements
Question
Calculate the mass of nitrogen supplied to soil by 5 kg of urea [CO(NH2)2].
[O = 16; N = 14; C = 12; H = 1]
Advertisements
Solution
Molecular mass of Urea [CO(NH2)2] = [12 + 16 + (14 + 2 × 1) × 2]
= [12 + 16 + 32] = 60
Weight of nitrogen in 60 kg = 28 kg
∴ Weight of nitrogen in 5 kg = `28/60 xx 5`
= 2.33 kg
APPEARS IN
RELATED QUESTIONS
Define the term:
Vapour density
Calculate the relative molecular mass of Potassium chlorate.
(use K = 39, Cl = 35.5, O = 16, C = 12, H = 1, Na = 23, N = 14, S=32)
Potassium nitrate on strong heating decomposes as under :
2KNO3 → 2KNO2 + O2
Calculate : Weight of oxygen formed when 5.05g of potassium nitrate decomposes completely.
(K = 39, 0 = 16, N = 14)
When excess lead nitrate solution was added to a solution of sodium sulphate, 15.1g of lead sulphate was precipitated. What mass of sodium sulphate was present in the original solution?
Na2SO4 + Pb(NO3)2 → PbSO4 + 2NaNO3
(H = 1, C = 12, O = 16, Na = 23, S = 32, Pb = 207)
Mention the term defined by the following sentence:
The mass of a given volume of gas compared to the mass of an equal volume of hydrogen.
Calculate the relative molecular mass of:
CuSO4. 5H2O
Calculate the relative molecular mass of:
CH3COONa
Calculate the relative molecular mass of:
CHCl3
Find the weight of 0.5 mole of O2.
The atomic mass of Chlorine is 35.5. What is its vapour density?
