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7 tháng 7 2021

Áp dụng quy tắc đường chéo:

\(a.\\ \Rightarrow\dfrac{V_{Cl_2}}{V_{O_2}}=\dfrac{15,6}{23,4}=\dfrac{2}{3}\\ \Rightarrow\left\{{}\begin{matrix}\%V_{Cl_2}=40\%\\\%V_{O_2}=60\%\end{matrix}\right.\)

\(b.\) 

Ta có: \(\dfrac{n_{Cl_2}}{n_{O_2}}=\dfrac{2}{3}\Leftrightarrow\dfrac{m_{Cl_2}}{m_{O_2}}=\dfrac{71.2}{32.3}=\dfrac{71}{48}\Leftrightarrow48m_{Cl_2}-71m_{O_2}=0\)

Mặt khác: \(m_{Cl_2}+m_{O_2}=5,95\)

\(\Rightarrow\left\{{}\begin{matrix}m_{Cl_2}=3,55\left(g\right)\\m_{O_2}=2,4\left(g\right)\end{matrix}\right.\)

 

7 tháng 7 2021

ko bạn ơi

13 tháng 2 2022

a) \(\left\{{}\begin{matrix}n_{Cl_2}+n_{O_2}=\dfrac{6,72}{22,4}=0,3\\\overline{M}=\dfrac{71.n_{Cl_2}+32.n_{O_2}}{n_{Cl_2}+n_{O_2}}=2.29=58\end{matrix}\right.\)

=> \(\left\{{}\begin{matrix}n_{Cl_2}=0,2\left(mol\right)\\n_{O_2}=0,1\left(mol\right)\end{matrix}\right.\)

\(\left\{{}\begin{matrix}\%V_{Cl_2}=\dfrac{0,2}{0,3}.100\%=66,67\%\\\%V_{O_2}=\dfrac{0,1}{0,3}.100\%=33,33\%\end{matrix}\right.\)

b) \(\left\{{}\begin{matrix}m_{Cl_2}=0,2.71=14,2\left(g\right)\\m_{O_2}=0,1.32=3,2\left(g\right)\end{matrix}\right.\)

13 tháng 2 2022

b ghi nhầm kìa mCl2 chứ :v

17 tháng 8 2021

a)

$n_{Cl_2} :  n_{O_2} = 1 : 2$

Suy ra : 

$\%V_{Cl_2} = \dfrac{1}{1 + 2}.100\% = 33,33\%$
$\%V_{O_2} = \dfrac{2}{1 + 2}.100\% = 66,67\%$

b)

Coi $n_{Cl_2} = 1 (mol) \Rightarrow n_{O_2} = 2(mol)$
$\%m_{Cl_2} = \dfrac{1.71}{1.71 + 2.32}.100\% = 52,59\%$
$\%m_{O_2} = 100\% -52,59\% = 47,41\%$

c)

$M_A = \dfrac{71.1 + 32.2}{1 + 2} = 45(g/mol)$
$d_{A/B} = \dfrac{45}{28} = 1,607$

4 tháng 7 2021

\(n_A=1\left(mol\right)\)

\(n_{HCl}=a\left(mol\right)\Rightarrow n_{O_2}=1-a\left(mol\right)\)

\(\overline{M}=8.45\cdot4=33.8\left(\dfrac{g}{mol}\right)\)

\(\Rightarrow m=36.5a+32\cdot\left(1-a\right)=33.8\left(g\right)\)

\(\Rightarrow a=0.4\)

\(\%V_{HCl}=\dfrac{0.4}{1}\cdot100\%=40\%\)

\(\%V_{O_2}=60\%\)

\(b.\)

\(n_{HCl}:n_{O_2}=0.4:0.6=2:3\)

\(n_{HCl}=2x\left(mol\right),n_{O_2}=3x\left(mol\right)\)

\(m_{hh}=2x\cdot36.5+3x\cdot32=4.225\left(g\right)\)

\(\Leftrightarrow x=0.025\left(mol\right)\)

\(m_{HCl}=0.025\cdot2\cdot36.5=1.825\left(g\right)\)

\(m_{O_2}=2.4\left(g\right)\)

4 tháng 7 2021

CẢM ƠN BẠN NHIỀU

 

24 tháng 12 2021

Giả sử có 1 mol khí Cl2, 2 mol khí O2

a) \(\left\{{}\begin{matrix}\%V_{Cl_2}=\dfrac{1}{1+2}.100\%=33,33\%\\\%V_{O_2}=\dfrac{2}{1+2}.100\%=66,67\%\end{matrix}\right.\)

\(\left\{{}\begin{matrix}\%m_{Cl_2}=\dfrac{1.71}{1.71+2.32}.100\%=52,59\%\\\%m_{O_2}=\dfrac{2.32}{1.71+2.32}.100\%=47,41\%\end{matrix}\right.\)

b) \(\overline{M}=\dfrac{1.71+2.32}{1+2}=45\left(g/mol\right)\)

=> \(d_{A/H_2}=\dfrac{45}{2}=22,5\)

c) \(n_A=\dfrac{6,72}{22,4}=0,3\left(mol\right)\)

=> mA = 0,3.45 = 13,5 (g)

19 tháng 4 2021

nA = 6.72/22.4 = 0.3 (mol) 

=> nH2 = 0.1 ( mol ) 

nO2 = 0.2 ( mol ) 

%VH2 = 0.1 / 0.3 * 100% = 33.33%

%VO2 = 66.67%

%mH2 = 0.1 * 2 / ( 0.1 * 2 + 0.2 * 32 ) * 100% = 3.03%

%mO2 = 96.67%

d A / H2 = ( 0.1 * 2 + 0.2 * 32) / 0.3 : 2 = 11 

Gọi số mol O2, CO2 là a, b

Có: \(\overline{M}=\dfrac{32a+44b}{a+b}=19,5.2=39\)

=> \(a=\dfrac{5}{7}b\)

=> \(\left\{{}\begin{matrix}\%V_{O_2}=\dfrac{a}{a+b}.100\%=\dfrac{\dfrac{5}{7}b}{\dfrac{5}{7}b+b}.100\%=41,67\%\\\%V_{CO_2}=\dfrac{b}{a+b}.100\%=\dfrac{b}{\dfrac{5}{7}b+b}.100\%=58,33\%\end{matrix}\right.\)

\(\left\{{}\begin{matrix}\%m_{O_2}=\dfrac{32a}{32a+44b}.100\%=34,188\%\\\%m_{CO_2}=\dfrac{44b}{32a+44b}.100\%=65,812\%\end{matrix}\right.\)

thay a = \(\dfrac{5}{7}b\) thôi bn :)

\(\%m_{O_2}=\dfrac{32a}{32a+44b}.100\%=\dfrac{32.\dfrac{5}{7}b}{32.\dfrac{5}{7}b+44b}.100\%=34,188\%\)

18 tháng 12 2020

\(n_{hh}=\dfrac{13,44}{22,4}=0,6mol\)

\(\overline{M_x}=24.2=48\)

\(\left\{{}\begin{matrix}SO_2:64\\O_2:32\end{matrix}\right.\)       48    = \(\dfrac{16}{16}=1\)

\(\Rightarrow n_{SO_2=}n_{O_2}=0,3mol\)

1. \(m_{hh}=0,3.64+0,3.32=28,8g\)

2. \(\%V_{SO_2}=\dfrac{0,3.22,4}{13,44}.100\%=50\%\)

\(\Rightarrow\%V_{O_2}=50\%\)

3. \(m_{SO_2}=0,3.64=19,2g\)

\(m_{O_2}=0,3.32=9,6g\)