Câu hỏi của Hoàng Thị Vân

a, PT: \(Zn+2HCl\rightarrow ZnCl_2+H_2\)b, Ta có: \(n_{Zn}=\dfrac{26}{65}=0,4\left(mol\right)\)Theo PT: \(n_{H_2}=n_{Zn}=0,4\left(mol\right)\)\(\Rightarrow V_{H_2}=0,4.22,4=8,96\left(l\right)\)PT: \(2H_2+O_2\underrightarrow{t^o}2H_2O\)Theo PT: \(n_{H_2O}=n_{H_2}=0,4\left(mol\right)\)\(\Rightarrow m_{H_2O}=0,4.18=7,2\left(g\right)\)Bạn tham khảo nhé!Câu trả lời: a, PT: \(Zn+2HCl\rightarrow ZnCl_2+H_2\)b, Ta có: \(n_{Zn}=\dfrac{26}{65}=0,4\left(mol\right)\)Theo PT: \(n_{H_2}=n_{Zn}=0,4\left(mol\right)\)\(\Rightarrow V_{H_2}=0,4.22,4=8,96\left(l\right)\)PT: \(2H_2+O_2\underrightarrow{t^o}2H_2O\)Theo PT: \(n_{H_2O}=n_{H_2}=0,4\left(mol\right)\)\(\Rightarrow m_{H_2O}=0,4.18=7,2\left(g\right)\)Bạn tham khảo nhé!