chemical-aritmatic

Question: Caffeine has a molecular weight of 194. If it contains 28.9% by mass of nitrogen, number of atoms of nitrogen in one molecule of caffeine is

1) 4

2) 6

3) 2

4)

Solution:

Explanation: No Explanation

atomic-mass

Rate this question:

★ ★ ★ ★ ★

Average rating: (0 votes)