Răspuns:
Explicație:
MAl2S3= 2.AAl + 3AS
=2.27 + 3.32
=150---------> 150 g/moli [ 1mol=150g]
MNa2SO4= 2 .23 + 32 + 4.16=142 -------> 142g/moli
MCaCO3=40 +12 +3.16=100--------> 100g/moli
MNaOH= 23 +16 +1 =40---------> 40g/moli
MHNO3 = 1+ 14 +3.16=63 --------> 63g/moli
MCa(OH)2= 40 + 2 .16 + 2=74---------> 74g/moli
