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

Caffeine has a molecular mass of 194 . If it contains 28.9% by mass of nitrogen, Calculate number of atoms of nitrogen in one molecule of caffeine ?

Calculate mass of one atom of nitrogen in gram.

Calculate mass of one atom of nitrogen in gram.

What is the mass in grams of one molecule of caffeine ( C_8H_10N_4O_2 ) ?

What is the molecular mass of substance, each molecule of which contains 4 atoms of carbon and 10 atoms of hydrogen?

An alkaloid contains 17.28% of nitrogen and its molecular mass is 162. The number of nitrogen atoms present in one molecule of the alkaloid is

The number of lone pairs of electrons in the nitrogen atom in ammonia molecule is?

Assuming that air at STP contained 80% by volume of nitrogen, the volume of air at STP that contains 4.8 xx 10^(23) molecules of notrogen is

If atomic mass of nitrogen is 14u and atomic mass of hydrogen is 1u, what is the molar mass of ammonia?

A biomolecule contains 2% magnesium by mass. The minimum molecular mass of biomolecule is