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1 mole of ammonia is of 17 g. Then what is the mass of 0.3 moles of ammonia?(a) 21g(b) 2.1g(c) 17g(d) 1gI had been asked this question during a job interview.Asked question is from Mole Concept and Molar Masses topic in chapter Chemistry Basic Concepts of Chemistry – Class 11

Answer»

The correct ANSWER is (b) 2.1g

For explanation I would say: Given that, 1 mole of ammonia is of 17 g. 0.3 mole of ammonia contains 17 X 0.3g of mass. IT’s because the MOLECULAR WEIGHT of a given pcompound is directly proportional to the number of moles of the given compound.



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