CBSE Class 11-science Answered
Caffine has a molecular weight of 194 . If it contains 28.9% by mass of nitrogen. How many N atoms are there in one molecule of caffeine
Asked by Anil | 15 May, 2017, 12:40: PM
Expert Answer
Molar mass of caffeine = 194u
N present in one molecule of caffeine = 28.9 % of 194 = 28.9/100 x 194 = 56u
Mass of one N atom = 14u
Hence 14u = 1N atom
56u = 56/14 N atom = 4N atom
Answered by Vaibhav Chavan | 15 May, 2017, 12:56: PM
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