How many moles of H2 gas are released when 5.00 moles of HCL react with excess aluminum?

Used the balanced equation 2h2+ o2 - -> 2h2o. if you have 7.2 grams of o2 , how many grams of h2o can you produce ?

There is one girl i like and i don't know how to tell her that, i have a feeling she knows but if she doesn't i don't want to make a fool out of myself how is one way to boost my confidence on asking her out

Can someone me with 3 and 4 plz. this is for masteries test.