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a, \(CO_2+Ca\left(OH\right)_2\rightarrow CaCO_{3\downarrow}+H_2O\)
\(SO_2+Ca\left(OH\right)_2\rightarrow CaSO_{3\downarrow}+H_2O\)
Gọi: \(\left\{{}\begin{matrix}n_{CO_2}=x\left(mol\right)\\n_{SO_2}=y\left(mol\right)\end{matrix}\right.\) \(\Rightarrow x+y=\dfrac{3,36}{22,4}=0,15\left(mol\right)\left(1\right)\)
Theo PT: \(\left\{{}\begin{matrix}n_{CaCO_3}=n_{CO_2}=x\left(mol\right)\\n_{CaSO_3}=n_{SO_2}=y\left(mol\right)\end{matrix}\right.\) ⇒ 100x + 120y =17 (2)
Từ (1) và (2) \(\Rightarrow\left\{{}\begin{matrix}x=0,05\left(mol\right)\\y=0,1\left(mol\right)\end{matrix}\right.\)
\(\Rightarrow\left\{{}\begin{matrix}\%V_{CO_2}=\dfrac{0,05.22,4}{3,36}.100\%\approx33,33\%\\\%V_{SO_2}\approx66,67\%\end{matrix}\right.\)
b, \(d_{A/He}=\dfrac{\dfrac{0,05.44+0,1.64}{0,15}}{4}\approx14,33\)
\(CO_2 + Ca(OH)_2 \to CaCO_3 + H_2O\)
Theo PTHH :
\(n_{CO_2} = n_{CaCO_3} = \dfrac{10}{100} = 0,1\ mol\)
\(n_{hỗn\ hợp\ khí} = \dfrac{11,2}{22,4} = 0,5(mol)\)
⇒ \(n_{CO} = 0,5 - 0,1 = 0,4(mol)\)
Suy ra : mhỗn hợp = 0,1.44 + 0,4.28 = 15,6(gam)
Vậy :
\(\%m_{CO_2} = \dfrac{0,1.44}{15,6}.100\% = 28,21\%\\\%m_{CO} = 100\% -28,21\% = 71,79\%\)
Ta có: \(n_{CaCO_3}=\dfrac{10}{100}=0,1\left(mol\right)\)
PT: \(CO_2+Ca\left(OH\right)_2\rightarrow CaCO_3+H_2O\)
Theo PT: \(n_{CO_2}=n_{CaCO_3}=0,1\left(mol\right)\)
\(n_{hh}=\dfrac{6,72}{22,4}=0,3\left(mol\right)\)
% số mol cũng là % thể tích.
\(\Rightarrow\left\{{}\begin{matrix}\%V_{CO_2}=\dfrac{0,1}{0,3}.100\%\approx33,33\%\\\%V_{CO}\approx66,67\%\end{matrix}\right.\)
a, \(CH_4+2O_2\underrightarrow{t^o}CO_2+H_2O\)
\(2C_2H_2+5O_2\underrightarrow{t^o}4CO_2+2H_2O\)
Ta có: \(n_{CH_4}+n_{C_2H_2}=\dfrac{33,6}{22,4}=1,5\left(mol\right)\left(1\right)\)
Theo PT: \(n_{CO_2}=n_{CH_4}+2n_{C_2H_2}=\dfrac{56}{22,4}=2,5\left(mol\right)\left(2\right)\)
Từ (1) và (2) \(\Rightarrow\left\{{}\begin{matrix}n_{CH_4}=0,5\left(mol\right)\\n_{C_2H_2}=1\left(mol\right)\end{matrix}\right.\)
\(\Rightarrow\left\{{}\begin{matrix}\%V_{CH_4}=\dfrac{0,5.22,4}{33,6}.100\%\approx33,33\%\\\%V_{C_2H_2}\approx66,67\%\end{matrix}\right.\)
b, Theo PT: \(n_{O_2}=2n_{CH_4}+\dfrac{5}{2}n_{C_2H_2}=3,5\left(mol\right)\Rightarrow m_{O_2}=3,5.32=112\left(g\right)\)