Ugljovodonici

CH2=CH-CH3 + H2O = CH3-CH(OH)-CH3 (2-propanol)

CH3-CH(OH)-CH3 + Na = CH3-CH(ONa)-CH3 + 1/2H2

1mol 2-propanola : 0.5mol H2 = x : 0.0025mol H2 (0.056/22.4)

x=0.005mol 2-propanola

m(2-propanola)=0.005mol x 60 g/mol

m(2-propanola)=0.3 g

1mol H2O : 1mol 2-propanola = x mol H2O : 0.005mol 2-propanola

x=0.005mol H2O

N(H2O)=n(H2O)xN_A

N(H2O)=0.005molx6.023x10²³

N(H2O)=0.030115x10²³

N(H2O)=3.0115x10²¹molekula