a) PTHH: \(2Cu+O_2\xrightarrow[]{t^o}2CuO\)
b) \(n_{Cu}=\dfrac{m_{Cu}}{M_{Cu}}=\dfrac{38,4}{64}=0,6\left(mol\right)\)
Theo PTHH: \(n_{O_2}=\dfrac{1}{2}n_{Cu}\)
⇒ \(n_{O_2}=\dfrac{1}{2}.0,6=0,3\left(mol\right)\)
\(\Rightarrow V_{O_2}=n_{O_2}.22,4=0,3.22,4=6,72\left(l\right)\)
c) \(CuO+H_2\xrightarrow[]{t^o}Cu+H_2O\)
\(n_{H_2}=\dfrac{11,2}{22,4}=0,5\left(mol\right)\)
Theo PTHH: \(n_{H_2}=n_{Cu}=n_{H_2O}=0,5\left(mol\right)\)
\(\Rightarrow m_{H_2O}=n_{H_2O}.M_{H_2O}=0,5.18=9\left(g\right)\)
\(\Rightarrow m_{Cu}=n_{Cu}.M_{Cu}=0,5.64=32\left(g\right)\)
a) PTHH: \(2Cu+O_2\xrightarrow[]{t^o}2CuO\)
b) \(n_{Cu}=\dfrac{m_{Cu}}{M_{Cu}}=\dfrac{38,4}{64}=0,6\left(mol\right)\)
Theo PTHH: \(n_{O_2}=\dfrac{1}{2}n_{Cu}\)
\(\Rightarrow n_{O_2}=0,3\left(mol\right)\)
\(\Rightarrow V_{O_2}=0,3.22,4=6,72\left(l\right)\)
c) Theo PTHH : \(n_{CuO}=n_{Cu}=0,6\left(mol\right)\)
Khối lượng đồng oxit thu được sau phản ứng:
\(\Rightarrow m_{CuO}=0,3.80=24\left(g\right)\)