Question

Chỉ em câu c với ạ

Answer 1

Bài 19 : c

\(n_{Zn}=\dfrac{6.5}{65}=0.1\left(mol\right)\)

\(Zn+2HCl\rightarrow ZnCl_2+H_2\)

\(0.1..................................0.1\)

\(n_{CuO}=\dfrac{24}{80}=0.3\left(mol\right)\)

\(CuO+H_2\underrightarrow{^{^{t^0}}}Cu+H_2O\)

\(1........1\)

\(0.3........0.1\)

\(LTL:\dfrac{0.3}{1}>\dfrac{0.1}{1}\Rightarrow CuOdư\)

\(n_{Cu}=n_{H_2}=0.1\left(mol\right)\)

\(m_{Cu}=0.1\cdot64=6.4\left(g\right)\)

 

Answer 2

Câu 32: 

PTHH: \(Fe_2O_3+3CO\xrightarrow[]{t^o}2Fe+3CO_2\uparrow\)

Ta có: \(n_{Fe_2O_3}=\dfrac{1,6}{160}=0,01\left(mol\right)\) 

\(\Rightarrow\left\{{}\begin{matrix}n_{Fe}=0,02\left(mol\right)\\n_{CO_2}=0,03\left(mol\right)\end{matrix}\right.\) \(\Rightarrow\left\{{}\begin{matrix}m_{Fe}=0,02\cdot56=1,12\left(g\right)\\V_{CO_2}=0,03\cdot22,4=0,672\left(l\right)\end{matrix}\right.\)

Answer 3

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