robert7248
19.01.2021 •
Chemistry
Which apparatus is used in measuring a base in laboratory? Show Options a. pipette b. measuring cylinder c. burette d. conical flask
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Ответ:
Bài 1. Có 30g dung dịch NaCl 20%. Tính nồng độ % dung dịch thu được khi
a. Pha thêm 20g H2O
b. Cô đặc dung dịch để chỉ còn 25g.