Question #a3e6c

1 Answer
Dec 4, 2017

0.6024 moles

Explanation:

The formula for calculating moles is n=m/Mn=mM

In this case, we know that the substance weighs 2.4112.411 g, or the mm variable in the formula.

To calculate the molar mass, in amu, of He, we can turn to the Periodic Table. It says that the molar mass (also know as average atomic mass) is 4.00264.0026 amu.

Now we can input these numbers into our formula.

n=m/Mn=mM

n=(2.411)/(4.0026)n=2.4114.0026

n=0.602358467n=0.602358467

If we round using significant figures, our answer should have 4.

Therefore there are 0.60240.6024 moles

Hope this helps!