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)

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

Đáp án C

Đáp án A

Hướng dẫn

C₆H₁₂O₆  → 2C₂H₅OH + 2CO₂
V_{C2H5OH nguyên chất} = 750 x 10% = 75 ml

→ m_C2H5OH = 75 x 0,7907 = 59,3025 gam.

→ n_C2H5OH = 59,3025 : 46 = 1,289 mol

→ n_C6H12O6 = 0,645 mol → m_C6H12O6 = 0,645 x 180 = 116,1 gam.

Mà H = 60% → m = 116,1 : 60% = 193,5 gam

Đáp án: A

C₆H₁₂O₆ → 30 - 35 o C e n z i m 2C₂H₅OH + 2CO₂

V_{C2H5OH nguyên chất} = 750 x 10% = 75 ml → m_C2H5OH = 75 x 0,7907 = 59,3025 gam.

→ n_C2H5OH = 59,3025 : 46 = 1,289 mol

→ n_C6H12O6 = 0,645 mol → m_C6H12O6 = 0,645 x 180 = 116,1 gam.

Mà H = 60% → m = 116,1 : 60% = 193,5 gam

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

PTHH: C₆H₁₂O₆ \(\xrightarrow{\text{men rượu}}\) 2CO₂ + 2C₂H₅OH

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

\(\rightarrow m_{C_2H_5OH}=0,4.80\%.46=14,72\left(g\right)\\ \rightarrow V_{C_2H_5OH}=\dfrac{14,72}{0,8}=18,4\left(g\right)\\ \rightarrow V_{ddC_2H_5OH}=\dfrac{18,4.100}{5,75}=320\left(ml\right)\)