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231.

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

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?

233.

Calculate the molar mass of the following:
H₂O

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234.

Calculate the molar mass of the following:
CO₂

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235.

Calculate the molar mass of the following:
CH₄

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236.

Calculate the molecular mass of glucose (C₆H₁₂O₆) molecule.

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237.

Calculate the gram molecular mass of sugar (C₁₂H₂₂O₁₁).

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238.

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

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239.

Explain the term 'mole'?

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240.

What is the utility of mole concept?

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