Ta có: \(n_{H_2}=\dfrac{65}{2}=32,5\left(mol\right)\)
PT: \(2H_2+O_2\underrightarrow{t^o}2H_2O\)
Theo PT: \(n_{H_2O}=n_{H_2}=32,5\left(mol\right)\)
\(\Rightarrow m_{H_2O}=32,5.18=585\left(g\right)\)
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