Молярная масса этих веществ:

Ca (OH) 2

Ba (OH) 2

LiOH

KOH

CsOH

NaOH

Mg (OH)

RbOH

1) Ca (OH) ₂ = 40 + (16+1) * 2 = 40+32+2=74

2) Ba (OH) ₂ = 137 + (16+1) * 2 = 137+32+2=171

3) LiOH = 7+16+1=8+16 = 24

4) KOH = 39+16+1 = 56

5) CsOH = 133+16+1 = 150

6) NaOH = 23+16+1 = 40

7) Mg (OH) ₂ = 24 + (16+1) * 2 = 24+32+2=58

8) RbOH = 85+16+1 = 102