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\(a.\)
\(GS:\)
\(n_{hh}=1\left(mol\right)\)
\(Đặt:n_{N_2}=a\left(mol\right),n_{CO_2}=b\left(mol\right)\)
\(\Rightarrow a+b=1\left(1\right)\)
\(m_A=28a+44b=18\cdot2=36\left(2\right)\)
\(\left(1\right),\left(2\right):\)
\(a=b=0.5\)
\(\%m_{N_2}=\dfrac{0.5\cdot28}{0.5\cdot28+0.5\cdot44}\cdot100\%=38.89\%\)
\(\%m_{CO_2}=61.11\%\)
\(b.\)
\(\dfrac{n_{N_2}}{n_{CO_2}}=\dfrac{0.5}{0.5}=\dfrac{1}{1}\)
\(n_{N_2}=n_{CO_2}=\dfrac{1}{2}\cdot n_A=\dfrac{0.2}{2}=0.1\left(mol\right)\)
\(Đặt:n_{CO_2}=x\left(mol\right)\)
\(\overline{M}=\dfrac{0.1\cdot28+0.1\cdot44+44x}{0.2+x}=20\cdot2=40\left(\dfrac{g}{mol}\right)\)
\(\Rightarrow x=0.2\)
\(m_{CO_2\left(cầnthêm\right)}=0.2\cdot44=8.8\left(g\right)\)
\(a.\)
\(m_{hh}=0.12\cdot90+0.15\cdot58=19.5\left(g\right)\)
\(b.\)
\(V_{hh}=\left(0.25+0.1+0.05\right)\cdot22.4=8.96\left(l\right)\)
\(c.\)
\(n_A=\dfrac{10.08}{22.4}=0.45\left(mol\right)\)
\(M_A=23\cdot2=46\left(\dfrac{g}{mol}\right)\)
\(m_A=0.45\cdot46=20.7\left(g\right)\)
\(d.\)
\(n_{hh}=\dfrac{6.72}{22.4}=0.3\left(mol\right)\)
Vì CO2 : O2 = 2 : 1
\(\Rightarrow n_{CO_2}=0.2\left(mol\right),n_{O_2}=0.1\left(mol\right)\)
\(m_{hh}=0.2\cdot44+0.1\cdot32=12\left(g\right)\)
\(\overline{M}=\dfrac{12}{0.3}=40\left(\dfrac{g}{mol}\right)\)
Đặt \(\hept{\begin{cases}a\left(mol\right)=n_{H_2}=n_{O_2\left(A\right)}\\2b\left(mol\right)=n_{Cl_2}\\3b\left(mol\right)=n_{O_2\left(B\right)}\end{cases}}\)
\(\overline{M_A}=\frac{2a+16.2a}{a+a}=\frac{34a}{2a}=17g/mol\)
\(\overline{M_B}=\frac{2b.71+3b.16.2}{2b+3b}=\frac{238b}{5b}=47,6g/mol\)
\(\rightarrow d_{A/B}=\frac{17}{47,6}=\frac{5}{14}\approx0,36\)
a, mX = 0,2.32 + 0,15.28 = 10,6 (g)
nX = 0,2 + 0,15 = 0,35 (mol)
=> MX = \(\dfrac{10,6}{0,35}=30,3\left(\dfrac{g}{mol}\right)\)
=> dX/kk = \(\dfrac{30,3}{29}=1,05\)
b, mY = 0,5.44 + 2.2 = 26 (g)
nY = 0,5 + 2 = 2,5 (mol)
=> MY = \(\dfrac{26}{2,5}=10,4\left(\dfrac{g}{mol}\right)\)
=> dY/O2 = \(\dfrac{10,4}{32}=0,325\)
c, mA = 17,75 + 8,4 = 26,15 (g)
nA = \(\dfrac{17,75}{71}+\dfrac{8,4}{28}=0,55\left(mol\right)\)
=> MA = \(\dfrac{26,15}{0,55}=47,6\left(\dfrac{g}{mol}\right)\)
=> dA/CO2 = \(\dfrac{47,6}{44}=1,1\)
Mình làm mẫu 3 ý đầu rồi mấy ý sau bạn tự làm nhé
1, a, + 8.2=16 => CH4
+ 8,5 . 2 = 17 => NH3
+ 16 . 2 =32 => O2
+ 22 . 2 = 44 => CO2
b, + 0,138 . 29 \(\approx4\) => He
+ 1,172 . 29 \(\approx34\) => H2S
+ 2,448 . 29 \(\approx71\Rightarrow Cl_2\)
+ 0,965 . 29 \(\approx28\) => N
mCH4 = 0,1 . 16 = 1,6 (g)
mN2 = 28 . 0,4 = 11,2 (g)
M(A) = (1,6 + 11,2)/(0,1 + 0,4) = 25,6 (g/mol)
d(A/H2) = 25,6/2 = 12,8
