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\(n_{HCl}=0,1\left(mol\right)\\ n_{H_2SO_4}=0,1\left(mol\right)\\ n_{Ba\left(HCO_3\right)_2}=0,15\left(mol\right)\\ Ba\left(HCO_3\right)_2+H_2SO_4\rightarrow BaSO_4\downarrow+2CO_2+2H_2O\\ Ba\left(HCO_3\right)_2\left(còn\right)+2HCl\rightarrow BaCl_2+2CO_2+2H_2O\\ n_{CO_2}=0,1.2+0,05.2=0,3\left(mol\right)\\ V_{CO_2\left(đktc\right)}=0,3.22,4=6,72\left(l\right)\\ n_{BaSO_4}=0,1\left(mol\right)\\ m_{\downarrow}=m_{BaSO_4}=233.0,1=23,3\left(g\right)\\ ChọnA\)
có: nCH4= \(\dfrac{2,24}{22,4}\)= 0,1( mol)
PTPU
CH4+ Cl2\(\xrightarrow[]{as}\) CH3Cl+ HCl
0,1......0,1..........0,1............. mol
\(\Rightarrow\) mCH3Cl= 0,1. 50,5= 5,05( g)
\(\Rightarrow\) mA= \(\dfrac{5,05}{100\%-83,53\%}\)= 30,66( g)
\(\Rightarrow\) mCl2= 30,66. 83,53%= 25,61( g)
\(\Rightarrow\) \(\sum nCl2\)= \(\dfrac{25,61}{71}\)+ 0,1= 0,46( mol)
\(\Rightarrow\) VCl2= 0,46. 22,4= 10,304( lít)
\(n_{CO_2}=\dfrac{2,24}{22,4}=0,1\left(mol\right)\)
PTHH: \(C_2H_4+3O_2\xrightarrow[]{t^o}2CO_2+2H_2O\)
0,05<-----------0,1
\(\Rightarrow V=V_{C_2H_4}=0,05.22,4=1,12\left(l\right)\)
Chọn A
\(Ba+2HCl \to BaCl_2+H_2\\ n_{Ba}=\frac{13,7}{137}=0,1(mol)\\ n_{H_2}=n_{Ba}=0,1(mol)\\ V_{H_2}=0,1.22,4=2,24(l)\\ \text{Vậy chon đáp án C }\)
\(n_{hh}=\dfrac{11.2}{22.4}=0.5\left(mol\right)\)
\(n_{CH_4}=a\left(mol\right),n_{H_2}=b\left(mol\right)\)
\(\Rightarrow a+b=0.5\left(1\right)\)
\(n_{H_2O}=2a+b=\dfrac{12.6}{18}=0.7\left(mol\right)\left(2\right)\)
\(\left(1\right),\left(2\right):a=0.2,b=0.3\)
\(n_{CO_2}=n_{CH_4}=0.2\left(mol\right)\)
\(V=0.2\cdot22.4=4.48\left(l\right)\)
\(n_{MgCO_3}=\dfrac{12,6}{84}=0,15\left(mol\right)\)
\(MgCO_3+2HCl\rightarrow MgCl_2+H_2O+CO_2\)
0,15 0,15
\(V_{CO_2}=0,15.22,4=3,36\left(l\right)\)
--> A
Đáp án: B