称取 H 2 C 2 O 4 × 2H 2 O0.1670g 溶于适量的水中,用 0.1000mol/L 的 NaOH 标准溶液滴定,用去 23.46mL ,求样品中 H 2 C 2 O 4 × 2H 2 O 的质量分数。 ( 已知 M H 2 C 2 O 4 × 2H 2 O =126.1g/mol)
【简答题】对话填空 W: You look so happy. M: I have just (44) p_____ the College English Test Band 4. W: Oh, really? (45)C_________! Could you tell me some more information (46) a_______ it? M: Of (47) c_______....