Question

What mass of SO2 is formed from 64g of sulfur

Answer 1

64 g of S is 2 moles 64 g/32 g/mol = 2 
Along these lines 2 moles of SO2 will be shaped in light of the fact that the condition says that for each mol of S consumed you get a mol of SO2 
So change over the 2 mol of SO2 into mass by duplicating moles x molar mass 
Work a similar path for the second inquiry. Change over the grams of SO2 into moles at that point change over that number of moles again into mass of S