August 2022 1 14 Report
Вещество состоит из атомов меди и серы, массовый состав которых выражается отношением m (Cu):m(S)=2:1. Химическая формула этого вещества
A)Cu2S
B)CuS
C)CuS2
D)Cu7S4
E)Cu8S5
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