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nguyennam02012000
2 năm trước
Mình cần gấp lắm mn ơii, giúp mình vớiiii Cho 1g kim loại M tinh khiết tác dụng hoàn toàn với lượng vừa đủ dung dịch axit H2SO4 loãng thì thu được 0,4 lít khí H2. Khi cho 14g M ở trên tác dụng hoàn toàn với lượng vừa đủ dung dịch H2SO4 loãng nồng độ 24,5% đun nóng thì thu được dung dịch A. Khi làm lạnh hoàn toàn A thì thấy có 55,53g tinh thể ngậm nước của muối sunfat kim loại M kết tinh lắng xuống. Biết nồng độ muối Sunfat khi đó trong dung dịch bão hòa ở 3°C là 13,53% a) Xác định tên kim loại b)xác định muối ngậm nước
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I. Chọn từ có cách phát âm khác với các từ còn lại 1. A.misses B.stops C.teaches D.rises 2. A.plays B.smells C.cooks D.boils 3. A.watches B.hits C.snacks D.prevents 4. A.comes B.appears C.boils D.washes 5. A.commands B.turns C.cuts D.schools 6. A.trains B.stamps C.mans D.closes 7. A.buses B.boxes C.eats D.watches 8. A.caps B.bags C.stops D.wants 9. A.exists B.claims C.warns D.lives 10. A.hopes B.looks C.cuts D.stays 11. A.meets B.shops C.trucks D.goods 12. A.inventions B.lives C.kicks D.knows 13. A.coughs B.figures C.bosses D.wishes 14. A.finds B.mouths C.mopes D.chips 15. A.sings B.speaks C.gains D.opens 16. A.soups B.cuts C.boys D.wreaths 17. A.laughs B.misses C.ploughs D.signs 18. A.engages B.strikes C.paths D.mopes 19. A.reaches B.watches C.girls D.teaches 20. A.works B.begins C.develops D.shops II. Chọn từ có cách phát âm khác với các từ còn lại 1. A.played B.watched C.helped D.pushed 2. A.devoted B.divided C.suggested D.learned 3. A.finished B.missed C.lived D.hoped 4. A.tried B.opened C.added D.lived 5. A.breathed B.seated C.heated D.wanted 6. A.guided B.managed C.started D.chatted 7. A.threatened B.answered C.promised D.traveled 8. A.invented B.completed C.surrounded D.risked 9. A.liked B.involved C.believed D.happened 10. A.collected B.moved C.lasted D.shouted 11. A.wanted B.disappointed C.looked D.needed 12. A.helped B.played C.passed D.hoped 13. A.worked B.stayed C.installed D.improved 14. A.intended B.decided C.delicated D.dangered 15. A.cleaned B.educated C.referred D.delayed 16. A.looked B.laughed C.solved D.finished 17. A.raided B.admired C.afforded D.collected 18. A.supposed B.closed C.delayed D.visited 19. A.married B.enjoyed C.finished D.explored 20. A.selected B.failed C.deleted D.faded làm ơn giải thích

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