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thongchuyentoan
2 năm trước
Khi nung canxi cacbonat người ta thu được canxi oxit và khí cacbonic a) Viết pthh của phản ứng b) Tính khối lượng khí cacbonic sinh ra khi nung 4,5 tấn canxi cacbonat và thu được 2,52 tấn canxi oxit c) Nếu thu được 7g canxi oxit và 5,5g khí cacbonat thì cần bao nhiêu gam vanxi cacbonat?
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