Bài 5:

\(m_{Y}=m_{SO_2}+m_{CH_4}=\dfrac{3,36}{22,4}.64+\dfrac{13,44}{22,4}.16=19,2(g)\)

Bài 6:

\(V_{CO_2}=0,15.22,4=3,36(l)\\ V_{NO_2}=0,2.22,4=4,48(l)\\ V_{SO_2}=0,02.22,4=0,448(l)\\ V_{N_2}=0,03.22,4=0,672(l)\)

m h h = m C O 2 + m O 2 = (0,3.44) + (0,15.32) = 18(g)

→ V C O  = 22,4. n C O 2 + n O 2 = 10,08(l)

\(a.\)

\(m_{hh}=m_{SO_2}+m_{CO_2}=0.15\cdot64+0.2\cdot44=18.4\left(g\right)\)

\(n_{hh}=0.15+0.2=0.35\left(mol\right)\)

\(\overline{M}_X=\dfrac{m_{hh}}{n_{hh}}=\dfrac{18.4}{0.35}=52.5\left(\dfrac{g}{mol}\right)\)

\(b.\)

\(d_{X\text{/}NO_2}=\dfrac{52.57}{46}=1.14\)

bạn ơi tai sao khúc cuói lại chia cho 46 vậy

V_A = ( 0.2 + 0.75 + 1.5 ) * 22.4 = 54.88(l) 

m_A = m_SO2 + m_CO2 + m_N2 = 0.2*64 + 0.75*44 + 1.5*28 = 87.8 g 

Câu 1: \(m_{hh}=0,2\cdot27+0,4\cdot39=21\left(g\right)\)

Câu 2: \(V_{khí}=\left(0,1+0,15\right)\cdot22,4=5,6\left(l\right)\)

Câu 3: \(n_{NO_2}=\dfrac{6,9}{46}=0,15\left(mol\right)\) \(\Rightarrow V_{khí}=\left(0,15+0,15\right)\cdot22,4=6,72\left(l\right)\)

Câu 4: 

Ta có: \(\left\{{}\begin{matrix}n_{CO_2}=\dfrac{0,672}{22,4}=0,03\left(mol\right)\\n_{H_2}=\dfrac{8,96}{22,4}=0,4\left(mol\right)\end{matrix}\right.\) \(\Rightarrow m_{hh}=0,03\cdot44+0,4\cdot2=2,12\left(l\right)\)

Ta có: \(n_{hh}=\dfrac{4,48}{22,4}=0,2\left(mol\right)\)

Gọi: \(\left\{{}\begin{matrix}n_{CO}=x\left(mol\right)\\n_{CO_2}=y\left(mol\right)\end{matrix}\right.\) ⇒ x + y = 0,2 (1)

Mà: \(\overline{M}_{hh}=37,6\left(g/mol\right)\) ⇒ m_hh = 37,6.0,2 = 7,52 (g)

⇒ 28x + 44y = 7,52 (2)

Từ (1) và (2) \(\Rightarrow\left\{{}\begin{matrix}x=0,08\left(mol\right)\\y=0,12\left(mol\right)\end{matrix}\right.\)

\(\Rightarrow\left\{{}\begin{matrix}V_{CO}=0,08.22,4=1,792\left(l\right)\\V_{CO_2}=0,12.22,4=2,688\left(l\right)\end{matrix}\right.\)

a, khối lượng của 2,5 mol CuO là:
\(m=n.M=2,5.80=200\left(g\right)\)

b, số mol của 4,48 lít khí CO2 (đktc) là:
\(n=\dfrac{V}{22,4}=\dfrac{4,48}{22,4}=0,2\left(mol\right)\)

a.

mCuO=n.M=2,5.(1.64+1.16)= 200 mol