Question

срочно!!!!!!!!!!!!!!!!​

Answer 1

Ответ:

Mr[MnO2] = Ar[Mn] + Ar[O] * 2 = 54.938045 + 15.9994 * 2 = 86.936845≈86.94

Mr[H2O] = Ar[H] * 2 + Ar[O] = 1.00794 * 2 + 15.9994 = 18.01528≈18.02

≈4.82 раза.

Объяснение: