Question

Two sealed tanks each contains gas at 273 K. Tank A contains 9.00 g of argon gas, and tank B contains 18.7 g of chlorine gas. How many moles of gas are in each tank?

How would I start this problem

Answer 1

Argon is 40 grams / mol
so how many mols is 9 grams ?

Now watch out Chlorine Gas is Cl2
so 35.5*2 = 70 grams / mol

Answer 2

I mean 71 :)

Answer 3

So do I just do 9/40
and then do 18.7/70

Answer 4

Yes, but following the typo pointed out by Anonymous, that would be 71 and not 70 :-)

Answer 5

Got it thanks