Răspuns:
Explicație:
MCaCO3= 40 + 12+ 3.16 =100-------> 100g/moli
MH3PO4= 3 + 31 + 4.16 =98-------> 98g/moli
MMg(NO3)2= 24 + 2.14 + 6 .16 =148-------> 148g/moli
MCaS= 40 + 32= 72--------> 72g/moli
MNaOH= 23 + 16 +1 =40--------> 40g/moli
MAlPO4= 27 + 31 + 4.16 =122---------> 122g/moli