M CaO = ACa + AO = 40+16 =56
R at= Ca:O
R masa = 40:16=5:2
MH20 = 2× A H + A O = 2×1+16=2+16 =18
R at = H:O
R masa = 2:16 = 1:8
M CO 2= AC + 2×A O = 12+2×16= 12+32= 44
R at = C:O
R masa = 12:32= 3:8
M CaCO3= A Ca + A C + 3× A O = 40+12+3×16 =40+12+48=100
R at = Ca:C:O
R masa = 40:12 :48 =10:3:4
M H2SO4 = 2× A H + A S + 4×A O = 2×1+ 32+4×16= 2+32+64= 98
R at = H:S : O
R masa = 2:32:64= 1:16:32
M HNO3 = A H + A N + 2×A O = 1+14+48= 63
R at = H:N:O
R masa = 1:14:48
