{"common":{"save":0,"post_id":"8517","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"7586","post_id":"8517","mon_id":"1159539","chapter_id":"1159541","question":"<p data-pm-slice=\"1 1 []\">Than cháy t\u1ea1o ra khí carbonic theo ph\u01b0\u01a1ng trình: Carbon + oxygen → Khí carbonic. Kh\u1ed1i l\u01b0\u1ee3ng carbon \u0111ã cháy là 4,5kg và kh\u1ed1i l\u01b0\u1ee3ng oxygen ph\u1ea3n \u1ee9ng là 12kg. Kh\u1ed1i l\u01b0\u1ee3ng khí carbonic t\u1ea1o ra là?<\/p>","options":["A. 16,2 kg","B. 16.3 kg","C. 16,4 kg","D. 16,5 kg"],"correct":"4","level":"2","hint":"<p>Hãy áp d\u1ee5ng \u0111\u1ecbnh lý b\u1ea3o toàn kh\u1ed1i l\u01b0\u1ee3ng \u0111\u1ec3 gi\u1ea3i bài toán này.<\/p>","answer":"<p>\u0110áp án \u0111úng: <strong>D. 16,5 kg<\/strong><\/p><p>m<span class=\"math-tex\">$_{carbon}$<\/span> + m<span class=\"math-tex\">$_{oxygen}$<\/span> = m<span class=\"math-tex\">$_{carbon dioxide}$<\/span><\/p><p>=> m<span class=\"math-tex\">$_{carbon dioxide}$<\/span> = 4,5 + 12 = 16,5kg<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"139","test":"0","date":"2025-02-24 21:49:18","option_type":"txt","len":0},{"id":"7587","post_id":"8517","mon_id":"1159539","chapter_id":"1159541","question":"<p>\u0110i\u1ec1n ch\u1ea5t c\u1ea7n tìm và h\u1ec7 s\u1ed1 thích h\u1ee3p: FeO + CO → X + CO<span class=\"math-tex\">$_{2}$<\/span>?<\/p>","options":["A. Fe<span class=\"math-tex\">$_{2}$<\/span>O<span class=\"math-tex\">$_{3}$<\/span> & 1:2:3:1","B. Fe & 1:1:1:1","C. Fe<span class=\"math-tex\">$_{3}$<\/span>O<span class=\"math-tex\">$_{4}$<\/span> & 1:2:1:1","D. FeC & 1:1:1:1"],"correct":"2","level":"2","hint":"<p>Xét ph\u1ea3n \u1ee9ng gi\u1eefa FeO và CO, s\u1ea3n ph\u1ea9m chính là m\u1ed9t h\u1ee3p ch\u1ea5t s\u1eaft và khí CO<span class=\"math-tex\">$_{2}$<\/span>. B\u1ea1n c\u1ea7n xác \u0111\u1ecbnh ch\u1ea5t c\u1ea7n tìm và t\u1ec9 l\u1ec7 h\u1ec7 s\u1ed1 trong ph\u1ea3n \u1ee9ng.<\/p>","answer":"<p>\u0110áp án \u0111úng: <strong>B. Fe & 1:1:1:1<\/strong><\/p><p>Ph\u1ea3n \u1ee9ng này là ph\u1ea3n \u1ee9ng kh\u1eed oxit s\u1eaft FeO b\u1eb1ng CO. FeO b\u1ecb kh\u1eed thành Fe và CO<span class=\"math-tex\">$_{2}$<\/span> \u0111\u01b0\u1ee3c sinh ra. H\u1ec7 s\u1ed1 thích h\u1ee3p là 1:1:1:1, vì m\u1ed7i phân t\u1eed FeO ph\u1ea3n \u1ee9ng v\u1edbi m\u1ed9t phân t\u1eed CO \u0111\u1ec3 t\u1ea1o ra m\u1ed9t phân t\u1eed Fe và m\u1ed9t phân t\u1eed CO<span class=\"math-tex\">$_{2}$<\/span>.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"139","test":"0","date":"2025-02-24 21:51:02","option_type":"math","len":0},{"id":"7588","post_id":"8517","mon_id":"1159539","chapter_id":"1159541","question":"<p>Al + CuSO<span class=\"math-tex\">$_{4}$<\/span> → Al<span class=\"math-tex\">$_{x}$<\/span>(SO<span class=\"math-tex\">$_{4}$<\/span>)<span class=\"math-tex\">$_{y}$<\/span> + Cu. Tìm x, y?<\/p>","options":["A. x=2, y=3","B. x=3,y=4","C. x=1, y=2","D. x=y=1"],"correct":"1","level":"2","hint":"<p>Hãy cân b\u1eb1ng ph\u01b0\u01a1ng trình ph\u1ea3n \u1ee9ng gi\u1eefa nhôm (Al) và \u0111\u1ed3ng(II) sulfat (CuSO<span class=\"math-tex\">$_{4}$<\/span>). Chú ý \u0111\u1ebfn s\u1ef1 b\u1ea3o toàn nguyên t\u1ed1 và s\u1ef1 chuy\u1ec3n \u0111\u1ed5i gi\u1eefa các nguyên t\u1eed.<\/p>","answer":"<p>\u0110áp án \u0111úng: <strong>A. x=2, y=3<\/strong><\/p><p>Vì nhôm (Al) có hóa tr\u1ecb III và c\u1ea7n 2 nguyên t\u1eed \u0111\u1ec3 cân b\u1eb1ng v\u1edbi ion sulfate (SO<span class=\"math-tex\">$_{4}$<\/span>) có hóa tr\u1ecb II, nên x = 2 và y = 3 (\u0111\u1ea3m b\u1ea3o theo quy t\u1eafc hóa tr\u1ecb).<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"139","test":"0","date":"2025-02-24 21:53:41","option_type":"txt","len":1}]}