Question

Caffeine has a molecular weight of 194. It contains
28.9% by mass of nitrogen Number of atoms of
nitrogen in one molecule of it -
​

Answer 1

Answer:

Explanation:

The question is very easy.Just do what the question says and you are there:-

Mass of one molecule of caffein-194 u

Mass of total nitrogen in one molecule of caffein:-28.9*194/100=56.066

No. Of atoms of Nitrogen= No. of moles*Avogadro No.

No. of moles=Given mass/Actual mass

=56.066/14=4(approximatel)

No. of atoms=4*6.022*10^23=2.4088*10^24

Hope my answer is correc!

Answer 2

Explanation:

Mass of one molecule of caffein-194 u

Mass of total nitrogen in one molecule of caffein:-28.9*194/100=56.066

No. Of atoms of Nitrogen= No. of moles*Avogadro No.

No. of moles=Given mass/Actual mass

=56.066/14=4(approximatel)

No. of atoms=4*6.022*10^23=2.4088*10^24

Hope this answer helpful u