Lessons

Eamcet Chemistry
1st Year : Unit 1.2 (Basics & Concepts) - Emperical & Molecular Formula

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Q.

Caffine contains 28.9% by mass of nitrogen. If molecular mass of caffine is 194, then the number of nitrogen atoms present in one molecule of caffine is

View Answer

Correct choice: C

Explanation:

100 g of caffine contains 28.9 gm of N
194g of caffine contains (194/100)X28.9 =56.06g of N =56.06/14 =4
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