Question

cu tot cu explicatii! multumesc!​

Answer 1

a)8 g NaOH

V=300 cm^3=0,3 dm^3

n=m/M=>n=8/40=0,2 moli NaOH

Cm=n/Vs

Cm=0,2/0,3

Cm=0,6 M

b)Cm=n/Vs

Cm=5/1

Cm= 5 M

c)V=200 ml=0,02 l

25 g AgNO3 pt care aflăm nr moli

n=m/M=25/169=0,14 moli AgNO3

Cm=n/Vs

Cm=0,14/0,02

Cm=7 M

Baftă!