Răspuns :
a.
MH2S= 2+32 =34------->34 g/moli
b.
M Na2CO3 = 2.23 + 12 + 3.16=46 + 12 +48
=106-------->106g/moli
c.
M( NH4)2 SO4=2.14 + 8.1 + 32 + 4.16
=28 +8 +32 + 64
=132------->132g/moli
a.
MH2S= 2+32 =34------->34 g/moli
b.
M Na2CO3 = 2.23 + 12 + 3.16=46 + 12 +48
=106-------->106g/moli
c.
M( NH4)2 SO4=2.14 + 8.1 + 32 + 4.16
=28 +8 +32 + 64
=132------->132g/moli