mole revisited

Dunno if I'm doing correctly but here's a try :
First find how many mols of compound is equivalent to 15 grams. Let it be y mols.
y mols of compound has 2.36 * 10²³ molecules of water.
1 mol of compound has 2.36/y * 10²³ molecules of water.

Now 1 mol of compound has x mols of water.
x * 6.02 * 10²³ molecules of water = 2.36/y * 10²³

y is a known value. Find x.

got it !! tks :)
final eqn comes out 2be a linear in 'x'
answer is 7.2 or aproximating we get 7 only as the answer