## anonymous 3 years ago How many atoms of hydrogen are found in 8.01 mol of decane, C10H22?

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1. Mertsj

1 mole of decane contains avagadro's number of molecules or 6.023 x 10^23 molecules. So 8.01 moles contains : $8.01\times 6.023\times 10^{23} molecules$

2. Mertsj

But each molecule of decane contains 22 atoms of hydrogen so multiply the above answer by 22 to get the atoms of hydrogen.

3. anonymous

I did that and it said I was wrong.

4. Mertsj

Perhaps you entered your answer in the wrong form or didn't pay attention to significant digits.

5. Mertsj

What did you enter?

6. Mertsj

I got 1061.37 x 10^23 which would be 1.06 x 10^26

7. Mertsj

Three significant digits are all we are entitled to.