Answer:
hope this answer will help you.
Step-by-step explanation:
As we know that
no. of moles=mass)/molecular mass
we can easily fing mass of Ar by multiplying no. of moles with molecular mass of Ar which is 39.948
0.0823×39.948=3.28g
so the mass of Ar in 0.0823moles is 3.287g