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\(n_{H2}=\dfrac{3,36}{22,4}=0,15\left(mol\right)\)
a) Pt : \(Fe+2HCl\rightarrow FeCl_2+H_2|\)
1 2 1 1
0,15 0,3 0,15
b) \(n_{Fe}=\dfrac{0,15.1}{1}=0,15\left(mol\right)\)
⇒ \(m_{Fe}=0,15.56=8,4\left(g\right)\)
c) \(n_{HCl}=\dfrac{0,15.2}{1}=0,3\left(mol\right)\)
50ml = 0,05l
\(C_{M_{ddHCl}}=\dfrac{0,3}{0,05}=6\left(M\right)\)
Chúc bạn học tốt
nH2=0,15mol
PTHH: Fe+2HCL=>FeCl2+H2
0,15<-0,3<-0,15<-0,15
mFe tham gia phản ứng :
mFe=0,15.56=8,4g
CM (HCl)=n:V=0,3:0,05=6M
n(H2)=3,36/22,4=0,15
Fe + 2HCl--->FeCl2+H2
0,15....0,3.....................0,15
m(Fe) t/g p/u=0,15*56=8,4(g)
Cm(HCl)=0,3/(50/1000)=6 M
a)
$Fe + 2HCl \to FeCl_2 + H_2$
b) Theo PTHH : $n_{Fe} = n_{H_2} = \dfrac{3,36}{22,4} = 0,15(mol)$
$m_{Fe} = 0,15.56 = 8,4(gam)$
c) $n_{HCl} = 2n_{H_2} = 0,3(mol)$
$\Rightarrow C_{M_{HCl}} = \dfrac{0,3}{0,05} = 6M$
d) $2NaOH + H_2SO_4 \to Na_2SO_4 + 2H_2O$
$n_{H_2SO_4} = \dfrac{1}{2}n_{NaOH} = 0,25(mol)$
$m_{dd\ H_2SO_4} = \dfrac{0,25.98}{20\%} = 122,5(gam)$
$V_{dd\ H_2SO_4} = \dfrac{122,5}{1,14} = 107,5(ml)$
\(n_{H2}=\dfrac{3,36}{22,4}=0,15\left(mol\right)\)
Pt : \(Fe+2HCl\rightarrow FeCl_2+H_2|\)
1 2 1 1
0,15 0,3 0,15
\(n_{Fe}=\dfrac{0,15.1}{1}=0,15\left(mol\right)\)
⇒ \(m_{Fe}=0,15.56=8,4\left(g\right)\)
\(n_{HCl}=\dfrac{0,15.2}{1}=0,3\left(mol\right)\)
50ml = 0,05l
\(C_{M_{HCl}}=\dfrac{0,3}{0,05}=6\left(M\right)\)
Chúc bạn học tốt
\(n_{H_2}=\dfrac{V_{H_2}}{22,4}=\dfrac{3,36}{22,4}=0,15mol\)
a. PTHH: Fe + H2SO4 \(\rightarrow\) FeSO4 + H2
TL: 1 1 1 1
mol: 0,15 \(\leftarrow\) 0,15 \(\leftarrow\) 0,15 \(\leftarrow\) 0,15
\(b.m_{Fe}=n.M=0,15.56=8,4g\)
Đổi 150ml = 0,15 l
\(c.C_{MddH_2SO_4}=\dfrac{n}{V}=\dfrac{0,15}{0,15}=1M\)
a) `n_{H_2} = (3,36)/(22,4) = 0,15 (mol)`
PTHH: `Fe + 2HCl -> FeCl_2 + H_2`
Theo PT: `n_{Fe} = n_{H_2} = 0,15 (mol)`
`=> m_{Fe} = 0,15.56 = 8,4 (g)`
b) Theo PT: `n_{HCl} = 2n_{H_2} = 0,3 (mol)`
`=> m_{ddHCl} = (0,3.36,5)/(16\%) = 68,4375 (g)`
\(n_{H_2}=\dfrac{0.84}{22.4}=0.0375\left(mol\right)\)
\(Zn+2HCl\rightarrow ZnCl_2+H_2\)
\(.........0.075......0.0375\)
\(m_{HCl}=0.075\cdot36.5=2.7375\left(g\right)\)
a, PT: \(Fe+2HCl\rightarrow FeCl_2+H_2\)
b, Ta có: \(n_{H_2}=\dfrac{3,36}{22,4}=0,15\left(mol\right)\)
Theo PT: \(n_{Fe}=n_{H_2}=0,15\left(mol\right)\)
\(\Rightarrow m_{Fe}=0,15.56=8,4\left(g\right)\)