Объяснение:
Mr(NaOH)=23+16+1 = 40 г/моль
W(Na) = Ar(Na) *n / Mr(NaОН) *100% = 23*1 / 40*100% =57.5%
W(O) = Ar(O) *n / Mr(NaOH) *100% = 16*1/ 40 *100% =40%
W(H) = Ar(H) *n / Mr(NaOH) *100% = 1*1 / 40 *100% =2.5%
Объяснение:
Mr(NaOH)=23+16+1 = 40 г/моль
W(Na) = Ar(Na) *n / Mr(NaОН) *100% = 23*1 / 40*100% =57.5%
W(O) = Ar(O) *n / Mr(NaOH) *100% = 16*1/ 40 *100% =40%
W(H) = Ar(H) *n / Mr(NaOH) *100% = 1*1 / 40 *100% =2.5%