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hophamthanhngan6b
2 năm trước
1/ Ở 20 độ độ tan của NaCl là 36g. Khối lg NaCl trong 150g dung dịch NaCl 2/ Phản ứng nào để điều chế hidro trong phòng thí nghiêm k a: e + 2HCl → FeCl2 + H2 b: H2O + C → CO + H2 c: 2H2O → 2H2 + O2 d: CH4 → C + 2h2
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