Verified answer

         120 г                         Х г

    2CH3-CH2-CH2-OH + 2Na -> 2CH3-CH2-CH2-ONa + H2

n = 2 моль                       n = 2 моль

Mr = 60 г/моль                 Mr = 23г/моль

m = 120 г                          m = 46 г

120 г С3Н8О    -   Х г Na

120 г С3Н8О   -   46 г Na

m(Na) = 120 * 46 / 120 = 46 г