Question
Explain various addition reactions of alkynes.
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Answer
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→2. A sample of 0.50 g of an organic compound was treated according to Kjeldahl's method. The ammonia evolved was absorbed in 50 mL of $0.5 M H _2 SO _4$. The residual acid required 60 mL of 0.5 M solution of NaOH for neutralisation. Find the percentage composition of nitrogen in the compound.
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→(ii) Find (a) the total number and (b) the total mass of neutrons in 7 mg of 14C. (Assume that mass of a neutron $=1.675 \times 10^{-27} kg$ )
(iii) Find (a) the total number and (b) the total mass of protons in 34 mg of $NH _3$ at STP.
Will the answer change if the temperature and pressure are changed?