OK first check to see how many moles of each reactant you have. Check with the formula to see which one is the limiting reactant. Then use the stoichiometric coefficients to determine the maximum number of moles of water it's possible to make, finally, convert this to mass.
Any problems, just ask. Next time, try to be a bit more specific about what the trouble is, exactly.
popcorn, please don't give out answers in the homework help section. read the rules