MH2O=2+16=18
MNH3=14+3=17
MK2O=2.39 +94
MNaOH =23+6+1=40
MCa(OH)2=40+2.16 +2=74
MCaCO3=40+12+3.16=100
MNaNO3=23+14+3.16=85
MK2SO4=2.39 +32 +4.16=174
MCa(NO3)2=40+2.14 +6.16=164
MH2SO4=2+32+4.16=98
MAl2O3=2.27 +3.16=102
M Al(OH)3=27 +3.16 + 3=78
MNa3PO4=3.23 +31 + 4.16=164
MCa3(PO4)2=3.40+2.31 +8.16=310
M(NH4)2 SO4=2.14 +8 +32+4.16=132