Предмет: Химия, автор: nanavladimirovna

Обчислити відносну молекулярну масу і масову частку елементів HNO3

Ответы

Автор ответа: dmitrenkoangelina

Mr ( відносна молекулярна маса ) = Ar (H) + Ar (N) + 3 Ar ( O) = 1 + 14 + 3 * 16 = 15 + 48 = 63
w = Ar*n(індекс) / Mr * 100%
w ( H ) = 1*1/63 * 100* = 1.59%
w ( N ) = 14*1 / 63 * 100% = 22.22%
w ( O ) = 16*3 / 63 * 100% = 76.19%

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