1. Ta có: n_SO2 = \(\frac{2,24}{22,4}=0,1\left(mol\right)\)

=> m_SO2 = 0,1 x 64 = 6,4 (gam)

n_O2 = \(\frac{3,36}{22,4}=0,15\left(mol\right)\)

=> m_O2 = 0,15 x 32 = 4,8 (gam)

=> Khối lượng hỗn hợp:m_{hỗn hợp}=m_O2 + m_SO2 = 6,4 + 4,8 = 11,2g

2. Ta có: n_CO2 = \(\frac{4,4}{44}=0,1\left(mol\right)\)

n_O2 = \(\frac{3,2}{32}=0,1\left(mol\right)\)

=> V_{hỗn hợp}(đktc) = ( 0,1 + 0,1 ) x 22,4 = 4,48 (l)

3. Số mol H₂O: n_H2O = \(\frac{3.10^{23}}{6.10^{23}}=0,5\left(mol\right)\)

Câu 3:

\(n_{H_2O}=\frac{3.10^{23}}{6.10^{23}}=0,5\left(mol\right)\)

đkm

\(1,\\ a,m_{hh}=3.44+2.28=188(g)\\ b,m_{hh}=\dfrac{2,24}{22,4}.64+\dfrac{1,12}{22,4}.32=8(g)\\ 2,\\ a,V_{hh}=(\dfrac{4,4}{44}+\dfrac{0,4}{2}).22,4=6,72(l)\\ b,V_{hh}=(\dfrac{6.10^{23}}{6.10^{23}}+\dfrac{3.10^{23}}{6.10^{23}}).22,4=33,6(l)\)

\(a.V_{CO_2\left(dktc\right)}=0,25.22,4=5,6\left(l\right)\)

\(b.m_{Al_2O_3}=0,5.160=80\left(g\right)\)

a) Gọi $n_{CO_2} = a(mol) ; n_{SO_2} = b(mol)$
Ta có : 

$a + b = \dfrac{8,96}{22,4} = 0,4(mol)$

$\dfrac{44a + 64b}{a + b} = 27.2$

Suy ra : a = b = 0,2$
$V_{CO_2} = V_{SO_2} = 0,2.22,4 = 4,48(lít)$

b) Theo PTHH : $n_{K_2SO_3} = n_{SO_2} = 0,2(mol)$

$\Rightarrow m_{K_2SO_3} = 0,2.158 = 31,6(gam)$

Gọi $n_{K_2CO_3} = x(mol) ; n_{Na_2CO_3} = y(mol)$

$\Rightarrow 138x + 106y + 31,6 = 56(1)$

$n_{CO_2} = x + y = 0,2(2)$

Từ (1)(2) suy ra : x = y = 0,1

$m_{K_2CO_3} = 0,1.138 = 13,8(gam) ; m_{Na_2CO_3} = 0,1.106 = 10,6(gam)$

\(a.m_{Mg}=0,1.24=2,4\left(g\right)\\ m_{Ca}=0,2.40=8\left(g\right)\\ b.n_{hh}=\dfrac{2,8}{28}+\dfrac{13,2}{44}=0,4\left(mol\right)\\ \Rightarrow V_{hh}=0,4.22,4=8.96\left(l\right)\)

\(n_{O_2}=2a\left(mol\right),n_{N_2}=3a\left(mol\right),n_{SO_2}=4a\left(mol\right)\)

\(n_{hh}=2a+3a+4a=9a\left(mol\right)\)

\(\Rightarrow9a=\dfrac{5.4\cdot10^{23}}{6\cdot10^{23}}=0.9\)

\(\Rightarrow a=9\)

\(V_{hh}=0.9\cdot22.4=20.16\left(l\right)\)

\(m_{hh}=0.2\cdot32+0.3\cdot28+0.4\cdot64=40.4\left(g\right)\)