1, m dd :
\(m_{dd}=m_1+m_2=300\left(g\right)\)
\(m_{NaCl}=m_1.60\%+m_2.20\%=300.40\%\left(g\right)\)
\(\rightarrow m_1=150\left(g\right),m_2=150\left(g\right)\)
2,
Giả sử hỗn hợp khí X là 1 mol
Ta có hệ PT :
\(\left\{{}\begin{matrix}x+y=1\\44x+28y=1,225.32\end{matrix}\right.\)
\(\rightarrow x=0,7;y=0,3\)
\(\%V_{CO_2}=\dfrac{0,7.100\%}{1}=70\%\)
\(\%V_{N_2}=100\%-70\%=30\%\)
b,
1 lít khí hh X
--> CO2 = 0,7 l
N2 = 0,3 l
\(m_{CO_2}=\dfrac{0,7}{22,4}.44=1,375\left(g\right)\)
\(m_{N_2}=\dfrac{0,3}{22,4}.28=0,375\left(g\right)\)
\(m_{hhX}=1,375+0,375=1,75\left(g\right)\)
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