Question

In 100 ml HNO3 se dizolva 0,63 g HNO3.
Calculati concentrație molara.

Answer 1

c=n/V

n=nr de moli

V=volumul=100ml=0.1 L

n=m/M

M=1+14+3*16=15+48=63g/mol

n=0.63/63=0.01moli

c=0.01moli/0.1L=0.1 mol/L(M)