a)82 g H2SO3...........32 g S
x g H2SO3..............44,8 g S x = 114,8 g
b)98 g H3PO4.........1 mol P
58,8 kg H3PO4..............x moli P x = 600 moli P
c)62 g H2CO3.........2 g H2
0,744 g H2CO3.........x g H2 x = 0,024 g H2
63 g HNO3.........1 g H
x g HNO3...........0,024 g H x = 1,512 g HNO3