Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
\(n_{CO2}=\dfrac{11,2}{22,4}=0,5\left(mol\right)\)
Pt : \(C_6H_{12}O_6\xrightarrow[30-35^oC]{Menrượu}2C_2H_5OH+2CO_2\)
0,5 0,5
a) \(m_{C2H5OH}=0,5.46=23\left(g\right)\)
b) Pt : \(C_2H_5OH+O_2\xrightarrow[]{Mengiấm}CH_3COOH+H_2O\)
0,5 0,5
\(m_{CH3COOH\left(lt\right)}=0,5.60=30\left(g\right)\)
⇒ \(m_{CH3COOH\left(tt\right)}=30.80\%=24\left(g\right)\)
Chúc bạn học tốt
\(C_6H_{12}O_6\underrightarrow{t^o}2C_2H_5OH+2CO_2\uparrow\)(xt : men rượu )
0,5 0,5
\(n_{CO_2}=\dfrac{11,2}{22,4}=0,5\left(mol\right)\)
\(m_{C_2H_5OH}=0,5.46=23\left(g\right)\)
\(C_2H_5OH+O_2\underrightarrow{t^o}CH_3COOH+H_2O\) (men giấm )
0,5 0,5
\(m_{CH_3COOH}=0,5.60=30\left(g\right)\)
\(m_{CH_3COOHtt}=30.80\%=24\left(g\right)\)
\(n_{C_6H_{12}O_6}=\dfrac{1,8}{180}=0,01\left(mol\right)\)
PTHH: C6H12O6 --men rượu--> 2CO2 + 2C2H5OH
0,01---------------------->0,02----->0,02
=> \(\left\{{}\begin{matrix}V_{CO_2}=0,02.2.80\%.22,4=0,3584\left(l\right)\\m_{C_2H_5OH}=0,02.46.80\%=0,736\left(g\right)\end{matrix}\right.\)
A, Gọi X,y lần lượt là số mol của Mg và Al
Pthh:
Mg + H2SO4---> MgSO4 + H2
X. X. X. X
2Al + 3H2SO4---> Al2(SO4)3+3H2
Y. 1.5y. Y. 1.5y
Ta có pt:
24x + 27y= 1.95
X+1.5y=2.24/22.4=0.1
=> X=0.025, Y=0.05
%Mg= 0.025×24×100)/1.95=30.8%
%Al= 100%-30.8%=69.2%
mH2SO4= 0.025+1.5×0.05=0.1g
mH2= (0.025+0.05)×2=0.15g
C, Mdd H2SO4 = 0.1/6.5×100=1.54g
MddY= 1.54+1.95-0.15=3.34g
%MgSO4 vs %Al2(SO4)3 b tự tính nha
Câu 1 :
\(n_C = \dfrac{1 000 000.92\%}{12} = \dfrac{230000}{3}(mol)\\ \Rightarrow n_{CO} = n_C.H\% = \dfrac{230000}{3}.85\% = \dfrac{195500}{3}(mol) \\ V_{CO} = \dfrac{195500}{3}.22,4 = 1459733,33(lít)\)
Câu 2 :
\(n_{C\ pư} = n_{CO} = \dfrac{1428.1000}{22,4} = 63750(mol)\\ n_{C\ đã\ dùng} = \dfrac{63750}{80\%} = 79687,5(mol)\\ m_{than} = \dfrac{m_C}{92\%} = \dfrac{79687,5.12}{92\%} = 1039402,1(gam)\)
\(n_{C_2H_4}=\dfrac{4,48}{22,4}=0,2\left(mol\right)\)
PTHH: C2H4 + H2O \(\xrightarrow[Axit]{Men.rượu}\) C2H5OH
0,2 0,2
\(m_{C_2H_5OH}=0,2.46.80\%=7,36\left(g\right)\\ V_{C_2H_5OH}=\dfrac{7,36}{0,8}=9,2\left(ml\right)\)
\(n_{C_2H_4}=\dfrac{4,48}{22,4}=0,2mol\)
\(C_2H_4+H_2O\xrightarrow[axit]{lên.men}C_2H_5OH\)
0,2 0,2 ( mol )
\(m_{C_2H_5OH}=0,2.46.80\%=7,36g\)
\(C_{C_2H_5OH}=\dfrac{7,36}{0,8}=9,2ml\)
n glucozo = 360/180 = 2(mol)
n glucozo phản ứng = 2.80% = 1,6(mol)
$C_6H_{12}O_6 \xrightarrow{t^o,xt} 2CO_2 + 2C_2H_5OH$
$CO_2 + Ca(OH)_2 \to CaCO_3 + H_2O$
Theo PTHH :
n CaCO3 = n CO2 = 2n glucozo pư = 1,6.2 = 3,2(mol)
m CaCO3 = m = 3,2.100 = 320(gam)
Ta có: \(n_{C_6H_{12}O_6}=\dfrac{360}{180}=2\left(mol\right)\)
PT: \(C_6H_{12}O_6\xrightarrow[t^o]{menruou}2C_2H_5OH+CO_2\)
______2_______________________4 (mol)
Vì: H% = 80% ⇒ nCO2 (thực tế) = 4.80% = 3,2 (mol)
\(CO_2+Ca\left(OH\right)_2\rightarrow CaCO_{3\downarrow}+H_2O\)
3,2_________________3,2 (mol)
⇒ mCaCO3 = 3,2.100 = 320 (g)
Bạn tham khảo nhé!
\(n_{CaCO_3}=\dfrac{60}{100}=0,6mol\)
\(n_{CaCO_3}=0,6.80\%=0,48mol\)
\(CaCO_3\rightarrow\left(t^o\right)CaO+CO_2\)
0,48 0,48 ( mol )
\(V_{CO_2}=0,48.22,4=10,752l\)
=>Chọn C
a, \(n_{CH_3COOH}=0,2.1=0,2\left(mol\right)\)
PT: \(Mg+2CH_3COOH\rightarrow\left(CH_3COO\right)_2Mg+H_2\)
Theo PT: \(n_{Mg}=n_{H_2}=\dfrac{1}{2}n_{CH_3COOH}=0,1\left(mol\right)\)
\(\Rightarrow m=m_{Mg}=0,1.24=2,4\left(g\right)\)
\(V=V_{H_2}=0,1.22,4=2,24\left(l\right)\)
b, \(C_2H_5OH+O_2\underrightarrow{^{mengiam}}CH_3COOH+H_2O\)
Theo PT: \(n_{C_2H_5OH}=n_{CH_3COOH}=0,2\left(mol\right)\)
\(\Rightarrow m_{C_2H_5OH}=0,2.46=9,2\left(g\right)\)
\(\Rightarrow V_{ddC_2H_5OH}=\dfrac{9,2}{0,8}=11,5\left(ml\right)\)
nCO = 5.6/22.4 = 0.25 (mol)
CuO + CO -to-> Cu + CO2
0.25___0.25_________0.25
mCuO = 0.25*80 = 20 (g)
VCO2 = 0.25*22.4 = 5.6 (l)
b)
nCO2 (pư) = 0.25*0.8 = 0.2 (mol)
Ca(OH)2 + CO2 => CaCO3 + H2O
__________0.2______0.2
mCaCO3 = 0.2*100=20 (g)
CuO+CO= (t0)CU+CO2
0,25<-0,25-> 0,25
nCO=5,6/22,4=0,25 mol
a/ x=mCuO=80. 0,25=20g
vCO2=0,25*22,45,6l
b/ CO2 +Ca(OH)2=CaCO3+H2O
0,25-> 0,25
mCaCO3=0,25. 100=25g
mCaCO3 pu=25 * 80/100=20g
c6h12o6 -> 2co2
1 -> 2
n -> 4
nc6h12o6= (1.4.100)/(2.80)= 2,5 (mol)
m= 2,5.180=450 (g)