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hanh26122004
2 năm trước
Hòa tan 40 gam lưu huỳnh trioxit vào cốc nước, sau phản ứng thu được 400 ml dd B. a. Tính nồng độ mol của dd B? b. Hòa tan 24 gam đồng(II) oxit vào B, sau khi phản ứng xảy ra hoàn toàn thu được dd D. Tính nồng độ mol của chất có trong dd D?
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