M,SO2= 32gS+2X16gO--> 64g/mol
in 64g oxid.........32gS
50g,,,,,,,,,,,,,,,,,,,,,,,,,X=50x32/64g S=.............................CALCULEAZA !!
M,CaSO4= 4OgCa + 32gS+4x16gO---> 136g/mol
in 136g sulfat..........32gS
200g,,,,,,,,,,,,,,,,,,,,Y= 200x32/136 gS=...................CALCULEAZA!!!!
m,S= X + Y=.................CALCULEAZA !!!!!