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

Answer:

There are 93.6 moles of hydrogen atoms are present in 5.2 moles of $C_7H_{18}$.

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 $C_7H_{18}$:

$5.2\times 18 mol=93.6 mol$

There are 93.6 moles of hydrogen atoms are present in 5.2 moles of $C_7H_{18}$.