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a) \(M_X=19.2=38\left(g/mol\right)\)
`=>` \(d_{X/kk}=\dfrac{38}{29}=1,310345\)
b) \(m_X=0,4.38=15,2\left(g\right)\)
Gọi \(\left\{{}\begin{matrix}n_{O_2}=x\left(mol\right)\\n_{CO_2}=y\left(mol\right)\end{matrix}\right.\)
`=>` \(\left\{{}\begin{matrix}32x+44y=15,2\\x+y=0,4\end{matrix}\right.\Leftrightarrow x=y=0,2\)
\(m_Y=0,1.28+15,2=18\left(g\right)\)
`=>` \(\left\{{}\begin{matrix}\%m_{N_2}=\dfrac{0,1.28}{18}.100\%=15,56\%\\\%m_{O_2}=\dfrac{0,2.32}{18}.100\%=35,56\%\\\%m_{CO_2}=100\%-15,56\%-35,56\%=48,88\%\end{matrix}\right.\)
b) \(M_{hh}=4.10=40\left(g/mol\right)\)
Gọi \(n_{NO_2}=a\left(mol\right)\)
`=>` \(\left\{{}\begin{matrix}m_{hh}=18+46a\left(g\right)\\n_{hh}=0,5+0,1+a=0,6+a\left(mol\right)\end{matrix}\right.\)
`=>` \(M_{hh}=\dfrac{m_{hh}}{n_{hh}}=\dfrac{18+46a}{0,6+a}=40\)
`=> a = 1`
`=> V_{NO_2(đktc)} = 1.22,4 = 22,4 (l)`
a) Gọi số mol của hỗn hợp X là \(a\left(mol\right)\left(a>0\right)\)
Vì thành phần % theo số mol bằng thành phần % theo thể tixh nên
\(\Rightarrow n_{N_xO}=\dfrac{a\cdot30}{100}=0,3a\left(mol\right)\\ n_{SO_3}=\dfrac{a\cdot30}{100}=0,3a\left(mol\right)\\ n_{CO_2}=a-0,3a-0,3a=0,4a\left(mol\right)\)
\(\Rightarrow m_{SO_3}=n\cdot M=0,3a\cdot80=24a\left(g\right)\\ m_{CO_2}=n\cdot M=0,4\cdot44=17,6\left(g\right) \)
\(\Rightarrow m_{h^2\text{ }X}=\dfrac{24a\cdot100}{43,795}=54,8a\left(g\right)\\ \Rightarrow m_{N_xO}=54,8a-17,6a-24a=13,2a\left(g\right)\\ \Rightarrow M_{N_xO}=\dfrac{m}{n}=\dfrac{13,2a}{0,3a}=44\left(g\right) \)
\(\Rightarrow14x+16=44\\ \Leftrightarrow14x=28\\ \Leftrightarrow x=2\)
\(\Rightarrow N_xO=N_2O\)
Vậy \(CTHH\) của \(N_xO\) là \(N_2O\)
\(\text{b) }M_{h^2X}=\dfrac{m}{n}=\dfrac{54,8a}{a}=54,8\left(g\right)\\ \Rightarrow D_{\dfrac{h^2X}{H_2}}=\dfrac{M_{h^2X}}{M_{H_2}}=\dfrac{54,8}{2}=27.4\left(lần\right)\)
Đặt \(\hept{\begin{cases}a\left(mol\right)=n_{H_2}=n_{O_2\left(A\right)}\\2b\left(mol\right)=n_{Cl_2}\\3b\left(mol\right)=n_{O_2\left(B\right)}\end{cases}}\)
\(\overline{M_A}=\frac{2a+16.2a}{a+a}=\frac{34a}{2a}=17g/mol\)
\(\overline{M_B}=\frac{2b.71+3b.16.2}{2b+3b}=\frac{238b}{5b}=47,6g/mol\)
\(\rightarrow d_{A/B}=\frac{17}{47,6}=\frac{5}{14}\approx0,36\)
Tham khảo cách làm nhé!
Có : \(d_{\dfrac{hh}{kk}}=0,3276\)
\(\Rightarrow M_{hh}=9,5004\)
\(\Rightarrow\dfrac{n_{O_2}}{n_{H_2}}=\dfrac{~1}{3}\)
=> %O2 = 25% . %H2 = 75 % .
\(a,\left\{{}\begin{matrix}n_{O_2}=1.30\%=0,3\left(mol\right)\\n_{CO_2}=1.20\%=0,2\left(mol\right)\\n_T=1-0,3-0,2=0,5\left(mol\right)\end{matrix}\right.\)
\(b,m_{O_2}=0,3.32=9,6\left(g\right)\)
\(c,m_{hh}=\dfrac{9,6}{49,48\%}=19,4\left(g\right)\\ m_{CO_2}=0,2.44=8,8\left(g\right)\\ \rightarrow m_T=19,4-9,6-8,8=1\left(g\right)\\ \rightarrow M_T=\dfrac{1}{0,5}=2\left(\text{g/mol}\right)\\ \rightarrow T:H_2\)
a. %V (ở cùng điều kiện) cũng là %n
\(Tacó:\%V_T=100-30-20=50\%\\ Trong1molhỗnhợp:\\ n_{O_2}=1.30\%=0,3\left(mol\right)\\ n_{CO_2}=1.20\%=0,2\left(mol\right)\\ n_T=1.50\%=0,5\left(mol\right)\\ b.m_{O_2}=0,3.32=9,6\left(g\right)\\ c.\%m_{O_2}tronghỗnhợplà49,48\%\\ Trong1molhỗnhợp:m_{hh}=\dfrac{9,6}{49,48\%}=19,4\left(g\right)\\ m_{CO_2}=0,2.44=8,8\left(g\right)\\ \Rightarrow m_T=19,4-9,6-8,8=1\left(g\right)\\ \Rightarrow M_T=\dfrac{1}{0,5}=2\\ \Rightarrow TlàH_2\)