1.

Calculate the mass ofnitrogen in 5 kg of urea. [CO(NH)ATO -16, N 14, C 12, H 1] [1](j)

Answer»

The formula forureais (NH2)2CO. The molar mass forureais 14*2+1*4+12+16= 60 g/mole. In this 60 g ofurea,nitrogenhas a mas of 28 g. So by simple proportion in5 kg of urea,nitrogenhas a mass =5 kg*28 g/60 g = 2.3kg



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