Answer:
[tex]\boxed {\boxed {\sf About \ 13.5 \ grams \ of \ Al}}[/tex]
Explanation:
To convert from moles to grams we must use the molar mass, which can be found on the Periodic Table.
- Aluminum (Al): 26.981538 g/mol
Use this number as a fraction.
[tex]\frac{26.981538 \ g \ Al }{1 \ mol \ Al}[/tex]
Multiply by the given number of moles.
[tex]0.500 \ mol \ Al *\frac{26.981538 \ g \ Al }{1 \ mol \ Al}[/tex]
The moles of aluminum will cancel.
[tex]0.500 *\frac{26.981538 \ g \ Al }{1 }[/tex]
[tex]0.500 *26.981538 \ g \ Al[/tex]
[tex]13.490769 \ g \ Al[/tex]
The original number of moles, 0.500, has 3 significant figures, so our answer must have the same.
For the number we calculated, that is the tenth place. The 9 in the hundredth place tells us to round the 4 to a 5.
[tex]13.5 \ g \ Al[/tex]
There are about 13.5 grams of aluminum in 0.500 moles.
