Предмет: Химия, автор: voin2014g

народ help!!!!! чему равна массовая доля Al2S3

Ответы

Автор ответа: тайная

дано:
Al₂S₃
найти: w(Al), w(S)
решение:
Mr(Al₂S₃) = 27*2 +32*3 = 150
w(э) = Ar(э)*n(э)Mr(в-ва)
w(Al) = 27*2150 = 0,36 или 36%
w(S) = 32*3150 = 0,64 или 64%
ответ:w(S) =64%, w(Al) = 36%,

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