\(n_{C_6H_{12}O_6}=\dfrac{18}{180}=0.1\left(mol\right)\)

\(C_6H_{12}O_6\underrightarrow{mr}2C_2H_5OH+2CO_2\)

\(0.1.....................0.2...............0.2\)

\(n_{CaCO_3}=n_{CO_2}=\dfrac{12.5}{100}=0.125\left(mol\right)\)

\(H\%=\dfrac{0.125}{0.2}\cdot100\%=62.5\%\)

\(n_{C_2H_5OH}=0.125\left(mol\right)\)

\(m_{C_2H_5OH}=0.125\cdot46=5.75\left(g\right)\)

a)

$C_6H_{12}O_6 \xrightarrow{t^o,men\ rượu} 2CO_2 + 2C_2H_5OH$
$CO_2 + Ca(OH)_2 \to CaCO_3 + H_2O$
b)

Theo PTHH :

n C2H5OH = n CO2 = n CaCO3 = 12,5/100 = 0,125(mol)

=> m C2H5OH = 0,125.46 = 5,75 gam

c)

Theo PTHH :

n glucozo phản ứng = 1/2 n CO2 = 0,125/2 = 0,0625(mol)

Vậy :

H = 0,0625.180/18   .100% = 62,5%

a, \(C_2H_6O+3O_2\underrightarrow{t^o}2CO_2+3H_2O\)

b, \(n_{C_2H_6O}=\dfrac{23}{46}=0,5\left(mol\right)\)

Theo PT: \(n_{O_2}=3n_{C_2H_6O}=1,5\left(mol\right)\)

\(\Rightarrow V_{O_2}=1,5.22,4=33,6\left(l\right)\)

c, \(V_{C_2H_6O}=\dfrac{100.46}{100}=46\left(ml\right)\)

\(\Rightarrow m_{C_2H_6O}=46.0,8=36,8\left(g\right)\)

\(\Rightarrow n_{C_2H_6O}=\dfrac{36,8}{46}=0,8\left(mol\right)\)

PT: \(C_2H_5OH+Na\rightarrow C_2H_5ONa+\dfrac{1}{2}H_2\)

Theo PT: \(n_{H_2}=\dfrac{1}{2}n_{C_2H_5ONa}=0,4\left(mol\right)\)

\(\Rightarrow V_{H_2}=0,4.22,4=8,96\left(l\right)\)

a.b.\(n_{CO_2}=\dfrac{5,6}{22,4}=0,25mol\)

\(2CH_3COOH+Na_2CO_3\rightarrow2CH_3COONa+CO_2+H_2O\)

       0,5                                                              0,25               ( mol )

\(m_{CH_3COOH}=0,5.60=30g\)

\(\%m_{CH_3COOH}=\dfrac{30}{45}.100=66,67\%\)

\(\%m_{C_2H_5OH}=100\%-66,67\%=33,33\%\)

c.\(m_{NaOH}=50.20\%=10g\)

\(n_{NaOH}=\dfrac{10}{40}=0,25mol\)

\(2NaOH+CO_2\rightarrow Na_2CO_3+H_2O\)

 \(\dfrac{0,25}{2}\)   <    \(\dfrac{0,25}{1}\)                                ( mol )

 0,25                           0,125                    ( mol )

\(m_{Na_2CO_3}=0,125.106=13,25g\)

a) 

2CH₃COOH + Na₂CO₃ --> 2CH₃COONa + CO₂ + H₂O

b) \(n_{CO_2}=\dfrac{5,6}{22,4}=0,25\left(mol\right)\)

PTHH: 2CH₃COOH + Na₂CO₃ --> 2CH₃COONa + CO₂ + H₂O

                  0,5<-----------------------------------0,25

=> m_CH3COOH = 0,5.60 = 30 (g)

=> m_C2H5OH = 45 - 30 = 15 (g)

c) \(n_{NaOH}=\dfrac{50.20\%}{40}=0,25\left(mol\right)\)

Xét tỉ lệ: \(\dfrac{n_{NaOH}}{n_{CO_2}}=\dfrac{0,25}{0,25}=1\) => Tạo muối NaHCO₃

PTHH: NaOH + CO₂ --> NaHCO₃

              0,25-------------->0,25

=> m_NaHCO3 = 0,25.84 = 21 (g)

Gọi \(\left\{{}\begin{matrix}n_{C_2H_5OH}=a\left(mol\right)\\n_{H_2O}=b\left(mol\right)\end{matrix}\right.\)

\(n_{H_2}=\dfrac{5,6}{22,4}=0,25\left(mol\right)\)

PTHH:

2C₂H₅OH + 2Na ---> 2C₂H₅ONa + H₂

a --------------------------------------------> 0,5a

2H₂O + 2Na ---> 2NaOH + H₂

b --------------------------------> 0,5b

Hệ pt \(\left\{{}\begin{matrix}46a+18b=20,2\\0,5a+0,5b=0,25\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}a=0,4\left(mol\right)\\b=0,1\left(mol\right)\end{matrix}\right.\)

\(\rightarrow\left\{{}\begin{matrix}m_{C_2H_5OH}=0,4.46=18,4\left(g\right)\\m_{H_2O}=0,1.18=1,8\left(g\right)\end{matrix}\right.\rightarrow\left\{{}\begin{matrix}V_{C_2H_5OH}=\dfrac{18,4}{0,8}=23\left(ml\right)\\V_{H_2O}=\dfrac{1,8}{1}=1,8\left(ml\right)\end{matrix}\right.\)

=> Độ rượu là: \(\dfrac{23}{23+1,8}=92,74^o\)

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 : 

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

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

1.

\(nCuO=\dfrac{2}{80}=0,025\left(mol\right)\)

\(2CH_3COOH+CuO\rightarrow\left(CH_3COO\right)_2Cu+H_2O\)

   2                      1                   1                      1    (mol)

\(CH_3CH_2OH+CuO\rightarrow CH_2CHO+Cu+H_2O\)

   1                         1            1               1          1 (mol)

    0,2                 0,2

 \(2CH_3COOH+2Na\rightarrow2CH_3COONa+H_2O\)

\(2CH_3CH_2OH+2Na\rightarrow2CH_3CH_2ONa+H_2\)

    2                      2                  2                     1  (mol)

 0,2                                                             0,1   (mol)

=> \(mCH_3CH_2OH=0,2.46=9,2\left(g\right)\)

\(nH_2=\dfrac{2,24}{22,4}=0,1\left(mol\right)\)

Theo cái bài thì mình suy từ dưới lên , có axit thì mình suy qua cuo trong pt ròi suy lên cuo ở trên suy qua rượu mà cái cuo ở dưới nó  = 0,2 (mol) ròi trong khi cái tổng mol cuo có 0,025 (mol) à v thì bn có cho nhầm số gam của chất nào hog.-.?

\(n_{H_2}=\dfrac{0,672}{22,4}=0,03\left(mol\right)\)

PTHH:
\(CH_3COOH+NaOH\rightarrow CH_3COONa+H_2O\)

0,04<------------0,04

\(CH_3COOH+Na\rightarrow CH_3COONa+\dfrac{1}{2}H_2\uparrow\)

0,04----------------------------------------->0,02

\(C_2H_5OH+Na\rightarrow C_2H_5ONa+\dfrac{1}{2}H_2\uparrow\)

0,005<--------------------------------0,01

\(\rightarrow m_{C_2H_5OH}=0,005.46=0,23\left(g\right)\)

n C2H5OH =a (mol) ; n CH3COOH = b(mol)

=> 46a + 60b = 27,2(1)

$2C_2H_5ONa + 2Na \to 2C_2H_5ONa + H_2$
$2CH_3COOH + 2Na \to 2CH_3COONa + H_2$

Theo PTHH :

n H2 = 0,5a + 0,5b = 5,6/22,4 = 0,25(2)

Từ (1)(2) suy ra a = 0,2 ; b = 0,3

Suy ra:

m C2H5OH = 0,2.46 = 9,2(gam)

m CH3COOH = 0,3.60 = 18(gam)