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Question

Calcium carbide reacts with nitrogen and forms an important fertilizer. How many grams of this fertilizer can be formed when 6.4 g of calcium carbide is completely used for this process?

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Solution

CaC2+N2 CaCN2+ C
Molecular weight of CaC2 = 40+(12×2)
=64 g
Molecular weight of CaCN2 = 40+12+(14×2)
=80 g
From the reaction 1 mole of CaC2 forms 1 mole of CaCN2.
6.4 g of CaC2 =6.464=0.1 mole
So it will form 0.1 mole of CaCN2.
Amount of calcium cyanamide produced =0.1×80=8 g

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