For the reaction #2Na + 2H_2O -> NaOH + H_2#, how many grams of hydrogen are produced from 130 g of sodium?
Well how many moles of sodium metal do you have......?
Now you have the stoichiometric equation:
If there are
Just as an aside, I would not want to be the mug who placed such a quantity of sodium metal in water. The reaction would be violent and explosive.