Đề tự luyện

Đề tự luyện

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Đ nh lu t b o toàn mol nguyên t Luy n thi 2011 Đ T LUY N Câu 1. Đ t cháy m t h n h p hidrocacbon ta thu đ c 2,24 lít ượ 2 CO (đktc) và 2,7 gam 2 H O thì th tích 2 O đã tham gia ph n ng cháy (đktc) là: A . 8,96 lít B. 4,62 lít C. 3,92 lít D. 5,6 lít Câu 2. Cho m t h n h p A g m 2 3 3 4 Fe, Fe O , FeO, Fe O tác d ng hoàn toàn v i 3 HNO d sau ư ph n ng thu đ c dung d ch B và khí C. Cho dung d ch B tác d ng hoàn toàn v i NaOH d thu ượ ư đ c k t t a E. Nung k t t a E trong không khí đ n kh i l ng không đ i thu đ c 16 gam ch t ượ ế ế ế ượ ượ r n F .M t khác cho m t lu ng khí CO d đi qua h n h p A thì thu đ c m gam ch t r n. Tính m . ư ựợ Bi t các ph n ng đ u s y ra hoàn toàn . ế A . 5,6 gam B. 11,2 gam C. 22,4 gam D. 2,8 gam Câu 3. Cho h n h p khí A g m 2,24 lít C H 2 2 , 1,12 lít C H 2 4
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