Question

How many moles of hydrogen are in 5.2 moles of c7h18

Answer 1

The percentage of hydrogen in C7H18 is calculated as follows:
[18/(12*7+1*8)]*100=18%
The amount of hydrogen in 5.2moles is given by:(18/100)*5.2=0.94moles

Answer 2

There are 93.6 moles of hydrogen atoms are present in 5.2 moles of
`C_7H_(18)`.

Step-by-step explanation:

We are given:

Moles of
`C_7H_(18)`= 5.2 mol

By Stoichiometry:

in 1 mole of
`C_7H_(18)` there are 18 moles of hydrogen atom.

So, moles of hydrogen atom in 5.2 mol of
`C_7H_(18)`:

`5.2* 18 mol=93.6 mol`

There are 93.6 moles of hydrogen atoms are present in 5.2 moles of
`C_7H_(18)`.