Buna te ajut cu placere!!!
Rap atomic:
Ca:S:O=1:1:4
Rap masic:
Ca:S:O=40:32:64=5:4:8
Comp procentuala:
MCaSo4=ACa+AS+4×AO=40+32+64=136 g/mol
In 136 g CaSo4.....40gCa....32gS.....64gO
In 100 g CaSo4.....xgCa.......ygS........zgO/=>
x=4000/136=29.41 g Ca
y=3200/136=23.52 g S
z=6400/136=47.05 g O
Sper ca te-am ajutat!!
