Bài 1.Người ta điều chế vôi sống( CaO) bằng cách nung đá vôi (CaCO3) a) Tính khối lượng vôi sống thu được từ 0,5 tấn đá vôi có chứa 20% tạp chất b) Tính lượng đá vôi cần thiết để thu được 420 kg vôi sống, biết hiệu suất phản ứng là 60% Bài 2. Đốt cháy hoàn toàn 68 gam khí hiđro và khí cacbon oxit thì cần dùng hết 89,6 lít khí Oxi a) Viết PTHH b) Tính khối lượng mỗi khí có trong hỗn hợp ban đầu c) Tính phần trăm thể tích mỗi khí có trong hỗn hợp ban đầu.

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