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a) C2H5OH + 3O2 --to--> 2CO2 + 3H2O
b) \(n_{C_2H_5OH}=\dfrac{2,3}{46}=0,05\left(mol\right)\)
PTHH: C2H5OH + 3O2 --to--> 2CO2 + 3H2O
0,05-->0,15-------->0,1
=> VCO2 = 0,1.22,4 = 2,24 (l)
c) VO2 = 0,15.22,4 = 3,36 (l)
=> Vkk = 3,36 : 20% = 16,8 (l)
\(n_{C_2H_5OH}=\dfrac{23}{46}=0,5\left(mol\right)\\a, PTHH:C_2H_5OH+3O_2\rightarrow\left(t^o\right)2CO_2+3H_2O\\ b,n_{O_2}=3.0,5=1,5\left(mol\right)\\ V_{O_2\left(đktc\right)}=22,4.1,5=33,6\left(l\right)\\ c,V_{C_2H_5OH}=46\%.100=46\left(ml\right)\\ C_2H_5OH+Na\rightarrow C_2H_5ONa+\dfrac{1}{2}H_2\\ n_{C_2H_5OH}=\dfrac{0,8.46}{46}=0,8\left(mol\right)\\ n_{H_2}=\dfrac{0,8}{2}=0,4\left(mol\right)\Rightarrow V_{H_2\left(đktc\right)}=0,4.22,4=8,96\left(l\right)\)
TK
Từ C2H4O2 ta có: M = 60 g/mol; mC = 2 x 12 = 24 g; mH = 4 x 1 = 4 g;
MO = 2 x 16 = 32 g.
%C = (24 : 60) x 100% = 40%; %H = (4 : 60) x 100% = 6,67%;
%O = 100% - 40% - 6,67% = 53,33%.
a) C2H5OH + 3O2 --to--> 2CO2 + 3H2O
b) \(n_{C_2H_5OH}=\dfrac{46}{46}=1\left(mol\right)\)
PTHH: C2H5OH + 3O2 --to--> 2CO2 + 3H2O
1----->3----------->2------->3
=> VO2 = 22,4.3 = 67,2 (l)
c) mH2O = 3.18 = 54 (g)
d) VCO2 = 2.22,4 = 44,8 (l)
\(a.C_2H_5OH+3O_2-^{t^o}\rightarrow2CO_2+3H_2O\\ n_{C_2H_5OH}=0,3\left(mol\right)\\ n_{CO_2}=2n_{C_2H_5OH}=0,6\left(mol\right)\\ \Rightarrow V_{CO_2}=0,6.22,4=13,44\left(l\right)\\ b.n_{O_2}=3n_{C_2H_5OH}=0,6\left(mol\right)\\ MàV_{O_2}=\dfrac{1}{5}V_{kk}\\ \Rightarrow V_{kk}=V_{O_2}.5=0,6.22,4.5=67,2\left(l\right)\\ c.n_{NaOH}=0,9\left(mol\right)\\ Tacó:\dfrac{n_{NaOH}}{n_{CO_2}}=\dfrac{0,9}{0,6}=1,5\\ \Rightarrow Tạora2muốiNaHCO_3vàNa_2CO_3\\ Đặt:n_{NaHCO_3}=x\left(mol\right);n_{Na_2CO_3}=y\left(mol\right)\\ \Rightarrow\left\{{}\begin{matrix}x+y=0,6\left(BTnguyento\left(C\right)\right)\\x+2y=0,9\left(BTnguyento\left(Na\right)\right)\end{matrix}\right.\\ \Rightarrow\left\{{}\begin{matrix}x=0,3\\y=0,3\end{matrix}\right.\\ \Rightarrow m_{muối}=0,3.84+0,3.106=57\left(g\right)\)
\(n_{CO2}=\dfrac{4,48}{22,4}=0,2\left(mol\right)\)
\(C_2H_5OH+3O_2\xrightarrow[]{t^o}2CO_2+3H_2O\)
0,1 0,3 0,2
b) \(m_{C2H5OH}=0,1.46=4,6\left(g\right)\)
c) \(V_{O2\left(dktc\right)}=0,3.22,4=6,72\left(l\right)\)
Chúc bạn học tốt
\(n_{C_2H_6O}=\dfrac{23}{46}=0,5\left(mol\right)\)
PTHH: C2H6O + 3O2 --to--> 2CO2 + 3H2O
0,5------------------->1
=> VCO2 = 1.22,4 = 22,4 (l)
a) PTHH : \(C_2H_6O+3O_2\left(t^o\right)->2CO_2+3H_2O\) (1)
b) \(n_{C_2H_6O}=\dfrac{m}{M}=\dfrac{23}{12.2+1.6+16}=0,5\left(mol\right)\)
Từ (1) -> \(n_{CO_2}=2n_{C_2H_6O}=1\left(mol\right)\)
=> \(V_{CO_2\left(đktc\right)}=n.22,4=1.22,4=22,4\left(l\right)\)