nC2H5OH=0,5(mol)

V(C2H5OH)=23/0,8=28,75(ml)

=> A=D_r= (28,75/250).100=11,5^o

PTHH: C2H5OH + O2 -men giấm---> CH3COOH + H2O

nCH3COOH=C2H5OH=0,5(mol)

=>mCH3COOH=0,5. 60=30(g)

=> m(giấm ăn)= 30/5%=600(g)

=>a=600(g)

a) n glucozo = 54/180 = 0,3(mol)

n glucozo pư = 0,3.80% = 0,24(mol)

$C_6H_{12}O_6 \xrightarrow{t^o} 2CO_2 +2 C_2H_5OH$

n C2H5OH = 2n glucozo = 0,48(mol)

m C2H5OH = 0,48.46 = 22,08(gam)

b)

$C_2H_5OH + O_2 \xrightarrow{men\ giấm} CH_3COOH + H_2O$
n CH3COOH = n C2H5OH = 0,48(mol)

C% CH3COOH = 0,48.60/500  .100% = 5,76%

C6H12O6-lm->2C2H5OH+2CO2

0,2--------------------0,4-------0,4

n C6H12O6=0,2 mol

=>VCO2=0,4.22,4=8,96l

=>m C2H5OH=0,4.46=18,4g

\(a,n_{C_6H_{12}O_6}=\dfrac{36}{180}=0,2\left(mol\right)\)

PTHH: \(C_6H_{12}O_6\underrightarrow{\text{men rượu}}2C_2H_5OH+2CO_2\uparrow\)

               0,2----------------->0,4----------->0,4

=> V_CO2 = 0,4.22,4 = 8,96 (l)

b, m_C2H5OH = 0,4.46.50% = 9,2 (g)

\(c,V_{C_2H_5OH}=\dfrac{9,2}{0,8}=11,5\left(ml\right)\\ \rightarrow V_{ddC_2H_5OH}=\dfrac{11,5.100}{60}=\dfrac{115}{6}\left(ml\right)\)

\(m_{\text{bình tăng}}=m_{CO_2}=16.456\left(g\right)\)

\(n_{CO_2}=\dfrac{16.456}{44}=0.374\left(mol\right)\)

\(C_6H_{12}O_6\underrightarrow{^{\text{men rượu}}}2C_2H_5OH+2CO_2\)

\(0.187......................0.374.......0.374\)

\(m_{C_6H_{12}O_6}=0.187\cdot180=33.66\left(g\right)\)

\(m_{C_2H_5OH}=0.374\cdot46=17.204\left(g\right)\)

Bài 5: 

\(CO_2 + Ca(OH)2 \to CaCO_3 + H_2O\\ m_{CO_2}= m_{bình\ tăng} = 16,456(gam)\\ \Rightarrow n_{CO_2}= \dfrac{16,456}{44} = 0,374(mol)\\ C_6H_{12}O_6 \xrightarrow{t^o,xt} 2CO_2 + 2C_2H_5OH\\ n_{glucozo} = \dfrac{1}{2}n_{CO_2} = 0,187(mol) \Rightarrow m_{glucozo} = 0,187.180 = 33,66(gam)\\ n_{C_2H_5OH} = n_{CO_2} = 0,374(mol) \Rightarrow m_{C_2H_5OH} = 0,374.46 = 17,204(gam)\)