Question

Question #a3e6c

Answer 1

0.6024 moles

Explanation:

The formula for calculating moles is `n=m/M`

In this case, we know that the substance weighs `2.411` g, or the `m` 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 `4.0026` amu.

Now we can input these numbers into our formula.

`n=m/M`

`n=(2.411)/(4.0026)`

`n=0.602358467`

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

Therefore there are `0.6024` moles

Hope this helps!