How many moles are in 48 molecules of H2O? What is the given amount?

Complete this brønsted-lowry reaction placing each product by its appropriate label. hso4- + hcn

Can someone me with these questions plz.

For the reaction shown, find the limiting reactant for each of the following initial amounts of reactants. 4al(s)+3o2(g)→2al2o3(s) a) 1 molal, 1 mol o2 b) 4 molal, 2.6 mol o2 c) 16 molal, 13 mol o2 d) 7.4 molal, 6.5 mol o2