WorksheetsHóa 9. Chủ đề I: Oxit.1
Total questions: 20
Worksheet time: 10mins
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Câu 20: Hoà tan 23,5 g kali oxit vào nước được 0,5 lít dung dịch A. Nồng độ mol của dd A là:
A. 0,25M. B. 0,5M C. 1M. D. 2M.
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