gui anh phong

<span class='text_page_counter'>(1)</span>Bai1 Lăc 13,14 gam Cu voi 250ml dung dich AgNO3 0,6M mot thoi gian thu duoc 22,56 gam chat ran A va dung dich B.Nhung thanh kim loai M nang 15,45 gam vao dung dich B khuay deu den khi phan ung hoan toan thu duoc mot muoi duy nhat va 17,355 gam chat ran Z.Kim loai M la A.Zn B.Mg C.Pb D.Fe Bai2 Dung dich A chua a mol HCl va b mol HNO3 cho A tac dung voi 1 luong vua du m gam Al thu duoc dung dich B va 7,84 lit hon hop khi C (dktc) gom NO,N2O va H2 co ti khoi so voi khi H2 la 8,5.Tron C voi 1 luong O2 vua du va dun nong cho toi khi pu xay ra hoan toan roi ran khi thu duoc qua dd NaOH du thay con lai 0,56 l khi (dktc) thoat ra . Gia tri cua a va b lan luot la A.0,1 va 2. B.0,2va1. C.1va0,2. D.2va0,1. Bai3 hoa tan hon hop gom NaHCO3,NaCl va Na2SO4 vao nuoc duoc dung dich X them H2SO4 loang vao dung dich X den khi thay khong co khi toat ra nua thi dung lai luc nay trong hon hop chua luong muoi voi khoi luong bang 0,9 lan khoi luong cua hon hop muôi ban dau.Vạy phan tram khoi luong cua NaHCO3 trong hon hop ban dau la A.84%. B.28,96%. C.64,62%. D.80%. Bai 4 hon hop X co the tich 4,48 l khi (dktc) gom H2 va vinylaxetilen co ti le mol tuong ung la 3:1 cho hon hop X qu xuc tac Ni nung nong thu duoc hon hop khi Y co ti khoi xon voi H2 la 14,5 cho taon bo hon hop Y tren tu tu qua dd Br2 du (pu xay ra hoan toan) thi koi luong da Br2 pu la A.16,0gam. B.8,0gam. C.32,0gam. D.3,2gam Thank you very much.

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