July 2022 1 30 Report
ребятушки!!!!
помогите пожалуйста..

растворе с массовой долей(Н2SO4) 98% растворили при нагревании медь, В следствие чего массовой долей кислоты снизилась до 86,5%>Вычислите массовую долю (CuSO4)в полученном растворе .​
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