Question

How many moles of hydrogen are in 2.8 moles of caffeine

Answer 1

Recall that a mole is defined as Avogadro's number of particles what the formula of caffeine basically tells us is that every molecule of caffeine you will have 8 atoms of carbon 10 atoms of hydrogen 4 atoms of nitrogen and 2 atoms of oxygen so if we have 0.3 moles of caffeine we will have 4*0.3 moles of nitrogen which is 0.12 and you got the idea

Answer 2

Answer: The moles of hydrogen in given moles of caffeine are 28 moles.

Explanation:

We are given:

Moles of caffeine = 2.8 moles

The chemical formula of caffeine is $C_8H_{10}N_4O_2$

In 1 mole of caffeine, 8 moles of carbon atoms, 10 moles of hydrogen atoms, 4 moles of nitrogen atoms and 2 moles of oxygen atoms are present.

So, in 2.8 moles of caffeine, moles of hydrogen atoms present will be $(10\times 2.8)=28$ moles

Hence, the moles of hydrogen in given moles of caffeine are 28 moles.