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a, \(\overline{M}=\dfrac{0,1.44+0,2.28}{0,1+0,2}\approx33,33\left(g/mol\right)\)
b, \(\overline{M}=\dfrac{0,2.28+0,3.2}{0,2+0,3}=12,4\left(g/mol\right)\)
c, \(\overline{M}=\dfrac{0,1.28+0,2.30+0,2.44}{0,1+0,2+0,2}=35,2\left(g/mol\right)\)
d, \(\overline{M}=\dfrac{0,2.56+0,1.24+0,1.27}{0,2+0,1+0,1}=40,75\left(g/mol\right)\)
\(a.\)
\(n_{hh}=0.2+0.15+0.1=0.45\left(mol\right)\)
\(V_X=0.45\cdot22.4=10.08\left(l\right)\)
\(b.\)
\(m_X=0.2\cdot28+0.15\cdot71+0.1\cdot32=19.45\left(g\right)\)
\(c.\)
\(\overline{M}_X=\dfrac{19.45}{0.45}=43.22\left(g\text{/}mol\right)\)
\(d.\)
\(d_{X\text{/}kk}=\dfrac{43.22}{29}=1.4\)
Nặng hơn không khí 1.4 lần
a) \(\overline{M}_A=5,875.2=11,75\left(g/mol\right)\)
b) Gọi số mol N2, H2 là a, b (mol)
\(\overline{M}_A=\dfrac{28a+2b}{a+b}=11,75\left(g/mol\right)\)
=> 16,25a = 9,75b
=> a = 0,6b
\(\left\{{}\begin{matrix}\%n_{N_2}=\dfrac{a}{a+b}.100\%=\dfrac{0,6b}{0,6b+b}.100\%=37,5\%\\\%n_{H_2}=\dfrac{b}{a+b}.100\%=\dfrac{b}{0,6b+b}.100\%=62,5\%\end{matrix}\right.\)
c)
1 mol hỗn hợp A chứa \(\left\{{}\begin{matrix}n_{N_2}=\dfrac{1.37,5}{100}=0,375\left(mol\right)\\n_{H_2}=\dfrac{1.62,5}{100}=0,625\left(mol\right)\end{matrix}\right.\)
\(\overline{M}_B=\dfrac{0,375.28+0,625.2+17x}{1+x}=6,4.2=12,8\left(g/mol\right)\)
=> x = 0,25 (mol)
\(a.\)
\(m_{hh}=m_{SO_2}+m_{CO_2}=0.15\cdot64+0.2\cdot44=18.4\left(g\right)\)
\(n_{hh}=0.15+0.2=0.35\left(mol\right)\)
\(\overline{M}_X=\dfrac{m_{hh}}{n_{hh}}=\dfrac{18.4}{0.35}=52.5\left(\dfrac{g}{mol}\right)\)
\(b.\)
\(d_{X\text{/}NO_2}=\dfrac{52.57}{46}=1.14\)
a) Ta có: \(m_{Cu}=0,5\times64=32\left(g\right)\)
\(m_{Fe}=0,125\times56=7\left(g\right)\)
mhhA = mCu + mFe = 32 + 7 = 39 (g).
b) \(M_{hhA}=\dfrac{39}{0,625}=62,4\left(g/mol\right)\).