Answer
Please see the work below.
Work Step by Step
We can find the number of hydrogen atoms as
$N=\frac{1cm}{0.1nm}$
$N=\frac{1\times 10^{-2}m}{0.1\times 10^{-9}m}$
$N=\frac{1\times 10^{-2}m}{1\times 10^{-10}m}$
$N=1\times 10^8atoms$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.