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Some Basic Concepts of Chemistry

Short Answer Type

231.
Calculate the mass of nitrogen supplied to the soil by 5Kg of urea [CO(NH₂)₂]?

The formula for urea is.

The molar mass for urea is 14x 2+1x 4+12+16= 60 g/mole.

In this 60 g of urea, nitrogen has a mass of 28 g.

So by simple proportion in 5 kg of urea,

nitrogen has a mass = $28 x \frac{5000}{60} = 2333.33 g = 2.3 k g$

Multiple Choice Questions

232.

20 mL solution of 0.1 M ferrous sulphate was completely oxidised using a suitable oxidising agent. What is the number of electrons exchanged?

1.204 x 10²²
193
1930
1.204 x 10²¹

Short Answer Type

233.

Calculate the molar mass of the following:
H₂O

119 Views

234.

Calculate the molar mass of the following:
CO₂

114 Views

235.

Calculate the molar mass of the following:
CH₄

102 Views

236.

Calculate the molecular mass of glucose (C₆H₁₂O₆) molecule.

113 Views

237.

Calculate the gram molecular mass of sugar (C₁₂H₂₂O₁₁).

145 Views

238.

How much copper can be obtained from 100 g of copper sulphate (CuSO₄)?

138 Views

Long Answer Type

239.

Explain the term 'mole'?

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240.

What is the utility of mole concept?

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Previous Year Papers

Test Series

Test Yourself

Short Answer Type

231. Calculate the mass of nitrogen supplied to the soil by 5Kg of urea [CO(NH2)2]?

Multiple Choice Questions

Short Answer Type

Long Answer Type

231.
Calculate the mass of nitrogen supplied to the soil by 5Kg of urea [CO(NH₂)₂]?