Question

If 2 grams of element X combine with 4 grams of element Y to form compound XY, how many grams of element Y would combine with 11 grams of X to form the same compound? grams

Answer 1

This is sort of simple.  2 grams of X can combine with 4 grams of Y to form XY.  Y is 2 times the amount of grams in X.  So if there are 11 grams of X there are 22 grams of Y to form XY.  Or you could take 11 divided by 2 is 5.5 and then multiply 4 by 5.5 to get 22.  If this is wrong please tell me I would be very happy to know.