Предмет: Химия, автор: Аноним

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ХИМИЯ

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Ответы

Автор ответа: Honduras
1

Для получения относительной атомной массы нужно массу атома разделить на массу атомной единицы массы (1/12 массы атома углерода)

1 а.е.м.=1,660 539 066 60*10⁻²⁷кг ≈1,66*10⁻²⁴ г

Относительная атомная масса гелия равна:

6,64*10⁻²⁴/1,66*10⁻²⁴=4

Ответ: 4

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