Thiếu đề ak bn

\(n_{Al}=\dfrac{2,7}{27}=0,1mol\\ a.2Al+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2\)

0,1           0,15               0,05               0,15

\(b.V_{H_2}=0,15.24,79=3,7185l\\ c.m_{Al_2\left(SO_4\right)_3}=0,05.342=17,1g\\ d.C_{M_{H_2SO_4}}=\dfrac{0,15}{0,4}=0,375M\)

D

a) 2Al+6HCl2AlCl3+3H2

b)

nAl==0,4(mol)

nAlCl3=nAl=0,4(mol)

mAlCl3=0,4.133,5=53,4(g)

c)

nH2=nAl=0,6(mol)

VH2=22,4.0,6=13,44(l)

d) n HCl=0,4.6\2=1,2 mol

=>Cm HCl=1,2\0,1=12M

\(n_{Al}=\dfrac{10,8}{27}=0,4\left(mol\right)\)

a) Pt : \(2Al+6HCl\rightarrow2AlCl_3+3H_2|\)

            2           6              2            3

          0,4         1,2           0,4          0,6

b) \(n_{H2}=\dfrac{0,4.3}{2}=0,6\left(mol\right)\)

\(V_{H2\left(dktc\right)}=0,6.24,79=14,874\left(l\right)\)

c)  \(n_{AlCl3}=\dfrac{0,6.2}{3}=0,4\left(mol\right)\)

⇒ \(m_{AlCl3}=0,4.133,5=53,4\left(g\right)\)

d) \(n_{HCl}=\dfrac{0,4.6}{2}=1,2\left(mol\right)\)

100ml = 0,1l

\(C_{M_{ddHCl}}=\dfrac{1,2}{0,1}=12\left(M\right)\)

 Chúc bạn học tốt

\(n_{Al}=\dfrac{5,4}{27}=0,2\left(mol\right)\\ 2Al+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2\\ 0,2........0,3...........0,1...........0,3\left(mol\right)\\ a.C_{MddH_2SO_4}=\dfrac{0,3}{0,3}=1\left(M\right)\\ b.m_{Al_2\left(SO_4\right)_3}=342.0,1=34,2\left(g\right)\\ c.V_{H_2\left(đktc\right)}=0,3.22,4=6,72\left(l\right)\)

PTHH: \(2Al+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2\)

a) \(n_{Al}=\dfrac{5,4}{27}=0,2\left(mol\right)\)

\(n_{H_2SO_4}=\dfrac{3}{2}n_{Al}=0,3\left(mol\right)\)

\(\Rightarrow C_{M_{H_2SO_4}}=\dfrac{0,3}{0,3}=1M\)

b) \(n_{Al_2\left(SO_4\right)_3}=\dfrac{1}{2}n_{Al}=0,1\left(mol\right)\)

\(\Rightarrow m_{Al_2\left(SO_4\right)_3}=n.M=0,1.342=34,2\left(g\right)\)

c) \(n_{H_2}=n_{H_2SO_4}=0,3\left(mol\right)\)

\(\Rightarrow V_{H_2}=n.22,4=0,3.22,4=6,72\left(l\right)\)

a, \(n_{Zn}=\dfrac{13}{65}=0,2\left(mol\right)\)

PT: \(Zn+2HCl\rightarrow ZnCl_2+H_2\)

_____0,2____0,4___________0,2 (mol)

\(\Rightarrow m_{HCl}=0,4.36,5=14,6\left(g\right)\)

b, \(V_{H_2}=0,2.24,79=4,958\left(l\right)\)

c, \(Fe_2O_3+3H_2\underrightarrow{t^o}2Fe+3H_2O\)

____________0,2__2/15 (mol)

\(\Rightarrow m_{Fe}=\dfrac{2}{15}.56=\dfrac{112}{15}\left(g\right)\)

Số mol của 13 gam Zn:

\(n_{Zn}=\dfrac{m}{M}=\dfrac{13}{65}=0,2\left(mol\right)\)

PTHH: \(Zn+2HCl\rightarrow ZnCl_2+H_2\uparrow\)

            1     :   2      :     1      :      1 (g)

          0,2\(\rightarrow\) 0,4       :     0,2  :       0,2  (mol)

a,Khối lượng của 0,4 mol HCl:

\(m_{HCl}=n.M=0,4.36,5=14,6\left(g\right)\)

b, Thể tích khí H2:

\(V_{H_2}=n.24,79=0,2.24,79=4,958\left(l\right)\)

\(3H_2+Fe_2O_3\underrightarrow{t^o}2Fe+3H_2O\)

Khối lượng của \(\dfrac{2}{15}\) mol Fe:

\(n_{Fe}=\dfrac{m}{M}=\dfrac{2}{\dfrac{15}{56}}\approx7,5\left(g\right)\)

Mong các bạn trả lời

Mình cần gấp lắm

\(a)n_{Zn}=\dfrac{3,9}{65}=0,06mol\\ Zn+2HCl\rightarrow ZnCl_2+H_2\)

0,06       0,12       0,06      0,06

\(V_{H_2}=0,06.24,79=1,4874l\\ b)V_{HCl}=\dfrac{0,12}{0,8}=0,15l=150ml\)

\(C_M\)\(_{ZnCl_2}=\dfrac{0,06}{0,15}=0,4M\)

a. \(m_{Al.pứ}=15-9,6=5,4\left(g\right)\)

b. \(\left\{{}\begin{matrix}\%m_{Al}=\dfrac{5,4.100\%}{15}=36\%\\\%m_{Cu}=\dfrac{9,6.100\%}{15}=64\%\end{matrix}\right.\)

c. \(n_{H_2}=\dfrac{3}{2}n_{Al}=\dfrac{3}{2}.\dfrac{5,4}{27}=0,3\left(mol\right)\Rightarrow V_{H_2\left(đkc\right)}=0,3.24,79=7,437\left(l\right)\)

d. \(\%m_{AlCl_3}=\dfrac{0,2.133,5.100\%}{15+200-9,6}=13\%\)