cau hoi kho den phat khoc

K

king_of_worlds

Áp dụng :
[TEX]C_1.V_1 = C_2.V_2\\ \Leftrightarrow C_1.V_1 = C_2.(V_1 + V_{H_2O}) \\\Leftrightarrow 20.400 = 10.(400 + V_{H_2O}\\ \Leftrightarrow V_{H_2O} = 400 ml[/TEX]
 
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