Answer :
The chemist weighed out 3.6 moles of aluminum.
To calculate the number of moles of aluminum that the chemist weighed out, we first need to know the molar mass of aluminum. The molar mass of aluminum is 26.98 g/mol.
Next, we can use the formula:
[tex]moles = \frac{mass}{molar mass}[/tex]
Plugging in the given mass of aluminum, we get:
moles = [tex]\frac{98.3 g }{26.98 g/mol}[/tex]= 3.64 mol
Rounding to the correct number of significant figures, the answer is: 3.6 mol
Therefore, the chemist weighed out 3.6 moles of aluminum.
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