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a) 2Fe + 3Cl2 --> 2FeCl3
b) \(n_{Fe}=\dfrac{5,6}{56}=0.1\left(mol\right)\)
2Fe + 3Cl2 --> 2FeCl3
0,1------------------->0,1
=> mFeCl3 = 0,1.162,5=16,25(g)
c) \(C_M=\dfrac{0,1}{0,1}=1M\)
Ta có: \(n_{Fe}=\dfrac{5,6}{56}=0,1\left(mol\right)\)
a, PT: \(2Fe+3Cl_2\underrightarrow{t^o}2FeCl_3\)
______0,1___0,15___0,1 (mol)
b, Có: \(m_{FeCl_3}=0,1.162,5=16,25\left(g\right)\)
c, \(C_{M_{FeCl_3}}=\dfrac{0,1}{0,1}=1M\)
Bạn tham khảo nhé!
Ta có:
\(\dfrac{5,6}{56}=0,1\left(mol\right)\)
b, Có:
c,
a) \(n_{Al}=\dfrac{2,7}{27}=0,1\left(mol\right)\)
PTHH: 4Al + 3O2 ---to→ 2Al2O3
Mol: 0,1 0,075 0,05
\(V_{O_2}=0,075.22,4=1,68\left(l\right)\)
b) \(m_{Al_2O_3}=0,05.102=5,1\left(g\right)\)
c)
PTHH: Al2O3 + 6HCl → 2AlCl3 + 3H2O
Mol: 0,05 0,3 0,1
\(m_{ddHCl}=\dfrac{0,3.36,5.100}{7,3}=150\left(g\right)\)
PTHH: \(2KOH+H_2SO_4\rightarrow K_2SO_4+2H_2O\)
Ta có: \(n_{KOH}=0,2\cdot0,5=0,1\left(mol\right)\)
\(\Rightarrow n_{H_2SO_4}=n_{K_2SO_4}=0,05\left(mol\right)\) \(\Rightarrow\left\{{}\begin{matrix}C_{M_{H_2SO_4}}=\dfrac{0,05}{0,1}=0,5\left(M\right)\\C_{M_{K_2SO_4}}=\dfrac{0,05}{0,2+0,1}\approx0,17\left(M\right)\end{matrix}\right.\)
Bài 1 :
200ml = 0,2l
100ml = 0,1l
\(n_{KOH}=0,5.0,2=0,1\left(mol\right)\)
a) Pt : \(2KOH+H_2SO_4\rightarrow K_2SO_4+2H_2O|\)
2 1 1 2
0,1 0,05 0,05
b) \(n_{H2SO4}=\dfrac{0,1.1}{2}=0,05\left(mol\right)\)
\(C_{M_{ddH2SO4}}=\dfrac{0,05}{0,1}=0,5\left(M\right)\)
c) \(n_{K2SO4}=\dfrac{0,05.1}{1}=0,05\left(mol\right)\)
\(V_{ddspu}=0,2+0,1=0,3\left(l\right)\)
\(C_{M_{K2SO4}}=\dfrac{0,05}{0,3}=\dfrac{1}{6}\left(M\right)\)
Chúc bạn học tốt
\(a.n_{CuO}=\dfrac{4}{80}=0,05\left(mol\right)\\ a.CuO+2HCl\rightarrow CuCl_2+H_2O\\ 0,05.......0,1........0,05.......0,05\left(mol\right)\\ b.m_{CuCl_2}=135.0,05=6,75\left(g\right)\\ b.C_{MddHCl}=\dfrac{0,1}{0,1}=1\left(M\right)\)
Câu 3 :
\(n_{CuO}=\dfrac{4}{80}=0,05\left(mol\right)\)
a) Pt : \(CuO+2HCl\rightarrow CuCl_2+H_2O|\)
1 2 1 1
0,05 0,1 0,05
b) \(n_{CuCl2}=\dfrac{0,05.1}{1}=0,05\left(mol\right)\)
⇒ \(m_{CuCl2}=0,05.135=6,75\left(g\right)\)
c) \(n_{HCl}=\dfrac{0,05.2}{1}=0,1\left(mol\right)\)
100ml = 0,1l
\(C_{M_{ddHCl}}=\dfrac{0,1}{0,1}=1\left(M\right)\)
Chúc bạn học tốt
a) PTHH: Zn + H2SO4 -> ZnSO4 + H2
nH2= 0,15(mol)
=> nZn=nH2SO4=nZnSO4=nH2=0,15(mol)
b) mZn=0,15.65=9,75(g)
c) CMddH2SO4= 0,15/ 0,05=3(M)
d) mZnSO4= 161. 0,15=24,15(g)
a, \(n_{Fe}=\dfrac{11,2}{56}=0,2\left(mol\right)\)
PT: \(Fe+2HCl\rightarrow FeCl_2+H_2\)
Theo PT: \(n_{H_2}=n_{FeCl_2}=n_{Fe}=0,2\left(mol\right)\)
\(\Rightarrow V_{H_2}=0,2.22,4=4,48\left(l\right)\)
b, \(m_{FeCl_2}=0,2.127=25,4\left(g\right)\)
c, \(n_{HCl}=2n_{H_2}=0,4\left(mol\right)\Rightarrow C_{M_{HCl}}=\dfrac{0,4}{0,3}=\dfrac{4}{3}\left(M\right)\)
\(C_{M_{FeCl_2}}=\dfrac{0,2}{0,3}=\dfrac{2}{3}\left(M\right)\)
a) 2Al + 3Cl2 --to--> 2AlCl3
b) \(n_{Al}=\dfrac{2,7}{27}=0,1\left(mol\right)\)
2Al + 3Cl2 --to--> 2AlCl3
0,1----------------->0,1
=> mAlCl3 = 0,1.133,5 = 13,35 (g)
=> \(C_M=\dfrac{0,1}{0,1}=1M\)
a, PTHH: 2Al + 3Cl2 \(\underrightarrow{t^o}\) 2AlCl3
b, \(n_{Al}=\dfrac{2,7}{27}=0,1mol\)
2Al + 3Cl2 \(\underrightarrow{t^o}\) 2AlCl3
0,1 0,15 0,1 ( mol )
\(m_{AlCl_3}=0,1.133,5=13,35g\)