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

b, \(n_{CH_4}=\dfrac{28}{22,4}=1,25\left(mol\right)\)

\(n_{CO_2}=n_{CH_4}=1,25\left(mol\right)\Rightarrow m_{CO_2}=1,25.44=55\left(g\right)\)

c, \(n_{O_2}=2n_{CH_4}=2,5\left(mol\right)\Rightarrow V_{O_2}=2,5.22,4=56\left(l\right)\)

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

\(n_{O_2}=\dfrac{8}{32}=0.25\left(mol\right)\)

\(CH_4+2O_2\underrightarrow{t^0}CO_2+2H_2O\)

\(0.125....0.25....0.125\)

\(m_{CH_4}=0.125\cdot16=2\left(g\right)\)

\(V_{CO_2}=0.125\cdot22.4=2.8\left(l\right)\)

\(Ca\left(OH\right)_2+CO_2\rightarrow CaCO_3+H_2O\)

\(............0.125.....0.125\)

\(m_{CaCO_3}=0.125\cdot100=12.5\left(g\right)\)

Đốt CH4 mà sản phẩm ra SO2 ?

a) $C_2H_5OH + 3O_2 \xrightarrow{t^o} 2CO_2 + 3H_2O$

b) $n_{C_2H_5OH} = \dfrac{4,6}{46} = 0,1(mol)$

$n_{O_2} = 3n_{C_2H_5OH} = 0,3(mol)$
$V_{O_2} = 0,3.22,4 = 6,72(lít)$

c)

Theo PTHH : 

$n_{CO_2} = 2n_{C_2H_5OH} = 0,2(mol) \Rightarrow V_{CO_2} = 0,2.22,4 = 4,48(lít)$

$n_{H_2O} = 3n_{C_2H_5OH} = 0,3(mol) \Rightarrow m_{H_2O} = 0,3.18 = 5,4(gam)$

\(n_{C_2H_2}=\dfrac{2,8}{22,4}=0,125\left(mol\right)\\ a,2C_2H_2+5O_2\rightarrow\left(t^o\right)4CO_2+2H_2O\\ b,n_{CO_2}=0,125.2=0,25\left(mol\right)\\ m_{CO_2}=0,25.44=11\left(g\right)\\ c,n_{O_2}=\dfrac{5}{2}.0,125=0,3125\left(mol\right)\\ V_{O_2\left(đktc\right)}=0,3125.22,4=7\left(l\right)\\ \Rightarrow V_{kk\left(đktc\right)}=\dfrac{100}{20}.7=35\left(l\right)\)

a: \(C+O_2\rightarrow CO_2\)(ĐK: t độ)

b: \(n_C=n_{CO_2}=\dfrac{2.4}{12}=0.2\left(mol\right)\)

\(m_{CO_2}=0.2\cdot44=8.8\left(g\right)\)

c: \(n_{O_2}=0.2\left(mol\right)\)

\(\Leftrightarrow V_{O_2}=4.48\left(lít\right)\)

hay \(V_{KK}=22.4\left(lít\right)\)

a. \(n_C=\dfrac{2,4}{12}=0,2\left(mol\right)\)

PTHH : C + O₂ -t^o> CO₂

           0,2     0,2       0,2

b. \(m_{CO_2}=0,2.44=8,8\left(g\right)\)

c. \(V_{O_2}=0,2.22,4=4,48\left(l\right)\)

\(V_{kk}=4,48.5=22,4\left(l\right)\)

n _C=\(\dfrac{2,4}{12}\)=0,2 mol

C+O₂-to>CO₂

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

=>m _CO2=0,2.44=8,8g

=>V _kk=0,2.22,4.5=22,4l

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!