Can someone help me factor this chemistry problem?

Posted on 2015-12-10 06:31:00 in Chemistry by JEMMY

I have tried and tried and I can't figure out the factors to use on this:

a) What mass of P4 is required to combine with 0.398 grams (g) of Cl2 to produce PCl3? Cl is Chlorine.
b) What mass of PCl3 results when 0.398 g of Cl2 is combined with the calculated mass of P4?
Equation to use:
P4(s) + 6Cl2(g) ---> 4PCl3 (l)
Unknown: P4
Known: 0.398g Cl2
I know that the atomic mass of Cl is 35.453 and the atomic mass of P is 30.9737
The equation is balanced already

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