\(n_{CH_4}=\dfrac{2,24}{22,4}=0,1mol\)

\(CH_4+2O_2\underrightarrow{t^o}CO_2+2H_2O\)

0,1         0,2    0,1

\(V_{O_2}=0,2\cdot22,4=4,48l\)

\(V_{CO_2}=0,1\cdot22,4=2,24l\)

a) PTHH: \(CH_4+2O_2\underrightarrow{t^o}CO_2+2H_2O\)

b+c)

Vì trong chất khí, tỉ lệ số mol cũng chính là tỉ lệ về thể tích 

\(\Rightarrow\left\{{}\begin{matrix}V_{CO_2}=V_{CH_4}=11,2\left(l\right)\\V_{O_2}=2V_{CH_4}=22,4\left(l\right)\end{matrix}\right.\)

a. \(n_{CH_4}=\dfrac{4.48}{22,4}=0,2\left(mol\right)\)

PTHH : CH₄ + 2O₂ ---t⁰---> CO₂ + 2H₂O

            0,2       0,4               0,2

b. \(V_{O_2}=0,4.22,4=8,96\left(l\right)\)

\(V_{CO_2}=0,2.22,4=4,48\left(l\right)\)

c. \(V_{kk}=8,96.5=44,8\left(l\right)\)

a, PT: \(CH_4+2O_2\underrightarrow{t^o}CO_2+2H_2O\)

b, Ta có: \(n_{CH_4}=\dfrac{5,6}{22,4}=0,25\left(mol\right)\)

Theo PT: \(\left\{{}\begin{matrix}n_{O_2}=n_{H_2O}=2n_{CH_4}=0,5\left(mol\right)\\n_{CO_2}=n_{CH_4}=0,25\left(mol\right)\end{matrix}\right.\)

\(\Rightarrow\left\{{}\begin{matrix}m_{CO_2}=0,25.44=11\left(g\right)\\m_{H_2O}=0,5.18=9\left(g\right)\end{matrix}\right.\)

c, Ta có: \(V_{O_2}=0,5.22,4=11,2\left(l\right)\)

Mà: V_O2 = 1/5V_kk

\(\Rightarrow V_{kk}=11,2.5=56\left(l\right)\)

Bạn tham khảo nhé!

\(n_{C_2H_4}=\dfrac{5.6}{22.4}=0.25\left(mol\right)\)

\(C_2H_4+3O_2\underrightarrow{^{t^0}}2CO_2+2H_2O\)

\(0.25.....0.75.......0.5\)

\(V_{kk}=5V_{O_2}=5\cdot0.75\cdot22.4=84\left(l\right)\)

\(m_{CO_2}=0.5\cdot44=22\left(g\right)\)

a) 

2KMnO₄ --t^o--> K₂MnO₄ + MnO₂ + O₂

2Cu + O₂ --t^o--> 2CuO
b) 

\(n_{CuO}=\dfrac{16}{80}=0,2\left(mol\right)\)

=> \(n_{O_2}=0,1\left(mol\right)\)

=> \(V_{O_2}=0,1.22,4=2,24\left(l\right)\)

c) \(n_{KMnO_4}=0,2\left(mol\right)\)

=> \(m_{KMnO_4}=0,2.158=31,6\left(g\right)\)

2KMnO₄-to>K₂MnO₄+MnO₂+O₂

0,2----------------------------------------0,1 mol

2Cu+O₂-to>2CuO

0,2---0,1------0,2

n _CuO=\(\dfrac{16}{80}\)=0,2 mol

=>V_O2=0,1.22,4=2,24l

=>m _KMnO4=0,2.158=31,6g

\(n_{C_2H_6O}=\dfrac{0.46}{46}=0.01\left(mol\right)\)

\(C_2H_6O+3O_2\underrightarrow{t^0}2CO_2+3H_2O\)

\(0.01..........0.03.....0.02\)

\(V_{CO_2}=0.02\cdot22.4=0.448\left(l\right)\)

\(V_{kk}=5V_{O_2}=5\cdot22.4\cdot0.03=3.36\left(l\right)\)

a) C₆H₁₀O₅  +  6O₂  → 6CO₂  +  5H₂O

nC₆H₁₀O₅ = \(\dfrac{16,2}{162}\)= 0,1 mol

Theo tỉ lệ phản ứng => nO₂ phản ứng = 6nC₆H₁₀O₅ = 0,1.6 = 0,6 mol

=> V O₂ = 0,6.22,4 = 13,44 lít.

b) nH₂O = 5nC₆H₁₀O₅ = 0,1.5 = 0,5 mol

=> mH₂O = 0,5.18 = 9 gam.

a, \(4Al+3O_2\underrightarrow{t^o}2Al_2O_3\)

b, \(n_{Al_2O_3}=\dfrac{20,4}{102}=0,2\left(mol\right)\)

Theo PT: \(n_{O_2}=\dfrac{3}{2}n_{Al_2O_3}=0,3\left(mol\right)\Rightarrow V_{O_2}=0,3.22,4=6,72\left(l\right)\)

c, \(V_{kk}=\dfrac{V_{O_2}}{20\%}=33,6\left(l\right)\)