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svetka1574

Ответ:

Объяснение:

Mr(NaOH) = 23+16 + 1 =40

W(Na) = Ar(Na) *n / Mr(NaOH)  *100% = 23*1 / 40  *100% =57%

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% =3%

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