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Bài 2:
a) Vì khối lượng mol của N2 và CO đều bằng 28 và lớn hơn khối lượng mol của khí metan CH4 (28>16)
=> \(d_{\dfrac{hhX}{CH_4}}=\dfrac{28}{16}=1,75\)
Hỗn hợp X nhẹ hơn không khí (28<29)
b)
\(M_{C_2H_4}=M_{N_2}=M_{CO}=28\left(\dfrac{g}{mol}\right)\\ \rightarrow M_{hhY}=28\left(\dfrac{g}{mol}\right)\\ d_{\dfrac{Y}{H_2}}=\dfrac{28}{2}=14\)
c) \(\%V_{NO}=100\%-\left(30\%+30\%\right)=40\%\\ \rightarrow\%n_{CH_4}=40\%\\ Vì:\%m_{CH_4}=22,377\%\\ Nên:\dfrac{30\%.16}{40\%.30+30\%.16+30\%.\left(x.14+16\right)}=22,377\%\\ \Leftrightarrow x=-0,03\)
Sao lại âm ta, để xíu anh xem lại như nào nhé.
Bài 1:
\(a.\\ d_{\dfrac{SO_2}{O_2}}=\dfrac{64}{32}=2\\ d_{\dfrac{SO_2}{N_2}}=\dfrac{64}{28}=\dfrac{16}{7}\\ d_{\dfrac{SO_2}{SO_3}}=\dfrac{64}{80}=0,8\\ d_{\dfrac{SO_2}{CO}}=\dfrac{64}{28}=\dfrac{16}{7}\\ d_{\dfrac{SO_2}{N_2O}}=\dfrac{64}{44}=\dfrac{16}{11}\\ d_{\dfrac{SO_2}{NO_2}}=\dfrac{64}{46}=\dfrac{32}{23}\\ b.M_{hhA}=\dfrac{1.64+1.32}{1+1}=48\left(\dfrac{g}{mol}\right)\\ d_{\dfrac{hhA}{O_2}}=\dfrac{48}{32}=1,5\)
\(n_{CO_2}=\dfrac{6,6}{44}=0,15\left(mol\right)\\ n_{N_2}=\dfrac{3,36}{22,4}=0,15\left(mol\right)\\ n_{NO_2}=\dfrac{8,96}{22,4}=0,4\left(mol\right)\\ \overline{M}_X=\dfrac{m_X}{n_X}=\dfrac{0,15.44+0,15.28+0,4.46}{0,15+0,15+0,4}=\dfrac{29,2}{0,7}=\dfrac{292}{7}\left(\dfrac{g}{mol}\right)\\ \Rightarrow d_{\dfrac{X}{kk}}=\dfrac{\dfrac{292}{7}}{29}\approx1,438\)
Câu 1:
\(d_{N_2/kk}=\dfrac{28}{29}\approx 0,97\\ d_{SO_2/kk}=\dfrac{80}{29}\approx 2,76\\ d_{NO_2/kk}=\dfrac{46}{29}\approx 1,59\)
Câu 2:
\(n_{CO_2}=\dfrac{0,44}{44}=0,01(mol);n_{N_2}=\dfrac{6.10^{23}}{6.10^{23}}=1(mol)\\ \Rightarrow V_{hh}=22,4(0,01+0,1+1)=24,864(l)\)
Câu 1:
\(d_{N_2/kk}=\dfrac{28}{29}=0,966\)
\(d_{SO_2/kk}=\dfrac{64}{29}=2,207\)
\(d_{NO_2/kk}=\dfrac{46}{29}=1,586\)
Câu 2:
\(n_{CO_2}=\dfrac{0,44}{44}=0,01\left(mol\right)\)
\(n_{N_2}=\dfrac{6.10^{23}}{6.10^{23}}=1\left(mol\right)\)
=> Vhh = (0,01+0,1+1).22,4 = 24,864(l)
1)
\(d_{SO_2/kk}=\dfrac{64}{29}\approx2,21\)
\(d_{N_2O/kk}=\dfrac{44}{29}\approx1,52\)
2)
\(d_{N_2/CO_2}=\dfrac{28}{44}\approx0,64\) \(d_{N_2/O_2}=\dfrac{28}{32}=0,875\)
\(d_{H_2/CO_2}=\dfrac{2}{44}\approx0,05\) \(d_{H_2/O_2}=\dfrac{2}{32}=0,0625\)
Câu 1 :
Coi
\(n_{SO_2} = n_{N_2O} = 1\ mol\\ M_{hỗn\ hợp} = \dfrac{64+44}{1+1} = 54(g/mol)\\ \Rightarrow d_{hh/không\ khí} = \dfrac{54}{29} = 1,86\)
Câu 2 :
Coi :
\(n_{N_2} = n_{H_2} = 1\ mol\\ M_{hỗn\ hợp} = \dfrac{28 + 2}{1 + 1} = 15(g/mol)\)
Suy ra :
\(d_{hh/CO_2} = \dfrac{15}{44} = 0,34\\ d_{hh/O_2} = \dfrac{15}{32} = 0,46875\)
\(\overline{M}_X=16,5.2=33\left(g/mol\right)\)
\(n_X=\dfrac{1}{22,4}=\dfrac{5}{112}\left(mol\right)\)
=> \(m_X=\dfrac{5}{112}.33=1,473\left(g\right)\)
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)`
\(a.M_A=32\cdot2=64\left(\dfrac{g}{mol}\right)\)
\(b.\)
\(n_A=\dfrac{5.6}{22.4}=0.25\left(mol\right)\)
\(m_A=0.25\cdot64=16\left(g\right)\)
a, Ta có: \(M_A=32.2=64\left(g/mol\right)\)
b, Có: \(n_A=\dfrac{5,6}{22,4}=0,25\left(mol\right)\)
\(\Rightarrow m_A=0,25.64=16\left(g\right)\)
Bạn tham khảo nhé!
Ta có: \(d_{NO/H_2}=\dfrac{M_{NO}}{M_{H_2}}=\dfrac{30}{2}=15\)
\(d_{CO_2/O_2}=\dfrac{M_{CO_2}}{M_{O_2}}=\dfrac{44}{32}=1,375\)
\(d_{NO_2/CH_4}=\dfrac{M_{NO_2}}{M_{CH_4}}=\dfrac{46}{16}=2,875\)
1. Ta có: \(d_{\dfrac{A}{O_2}}=\dfrac{M_A}{32}=0,5\left(lần\right)\)
\(\Leftrightarrow M_A=16\left(g\right)\)
Vậy A là nguyên tố oxi (O)
\(\Rightarrow m_O=\dfrac{4,48}{22,4}.16=3,2\left(g\right)\)
2.
- \(d_{\dfrac{NO}{N_2}}=\dfrac{30}{28}\approx1,07\left(lần\right)\)
- \(d_{\dfrac{NO_2}{N_2}}=\dfrac{46}{28}\approx1,64\left(lần\right)\)
- \(d_{\dfrac{CO_2}{N_2}}=\dfrac{44}{28}\approx1,57\left(lần\right)\)