a) hòa tan 10g nacl vào 40g nước thì nồng nộ phần trăm của dung dịch b)Hòa tan 16g NaOH vào nước để có 50ml dung dịch. Tính nồng độ mol của dung dịch. Gúp em với mọi người vote 5 sao và ctlhn ạ

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