Question

Question #a292a

Answer 1

`113 g`

Explanation:

We can solve this using simple dimensional analysis.

Start with the given quantity `1.70 xx 10^(25)` atoms `He`, and recognize that there are `4.003 g He` in `6.02 xx 10^(23)` atoms `He`:

`g He = 1.70 xx 10^(25) at oms He(4.003 g He)/(6.02 xx 10^(23) at omsHe) = 113 g He`