Вычисоиит Mr вещества и определить массовую долю каждого элемента…

MrCaO=1*(40+17)=57O2=2*17=34CaSO3=1*40+1*32+3*17=123MgSO4=1*24+1*32+4*17=124Cu (OH) 2=1*65+2*17+2+1=101Ca3 (PO4) 2=3*40+2*31+8*17=318Al (ClO4) 3=1*27+3*35+12*17=336W1) W (CaO) Ca=40/57*100%=70%O=17/57*100%=30%2) W (O2)=32*17/34*100*=100%3) W (CaSO4) Ca=40/123*100%=33%S=32/123*100%=26%O3=3*17/123*100%=41%4) W (MgSO4) Mg=24/124*100%=19%S=32/124*100%=26%O4=4*17/124*100%=55%5) W (Cu (OH) 2) Cu=65/101*100%=65%O2=2*17/101*100%=33%H2=2*1/101*100%=2%6) W (Ca3 (PO4) 2) Ca3=3*40/318*100%=38%P2=2*31/318*100%=19%O8=8*17/318*100%=43%7) W (Al (ClO4) 3) Al=27/336*100%=8%Cl3=3*35/336*100%=31%O12=12*17/336*100%=61%