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hoangtruyen333
2 năm trước
Hoà tan hỗn hợp gồm 2 kim loại kiềm kế tiếp nhau vào nước được dung dịch X và 336 ml khí H2(đktc). Cho HCl dư vào dung dịch X và cô cạn thu được 2,075 gam muối khan. Hai kim loại kiềm là: A. Li, Na. B. Na, K. C. K, Rb. D. Rb, Cs.
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