4. A 1.540 gram sample of an alloy containing only tin and zinc was reacted with excess fluorine gas to

produce 2.489 grams in total of a mixture of tin(IV) fluoride and zinc fluoride.

(b) Calculate the percent composition by mass of the two metals in the alloy.

1mol of Zn = 65.409g

1mol of Sn = 117.710g

1mol of F = 18.99840g

**Please Show Steps please, and also with define each step you are doing in-case I don't understand.

I am not sure what to start with, since there are so many variables

Thanks for Helping !