\(n_{N_2}=\dfrac{3,5}{28}=0,125\left(mol\right)\\ n_{O_2}=\dfrac{0,56}{22,4}=0,025\left(mol\right)\\ pthh:N_2+O_2\underrightarrow{t^o}2NO\\ LTL:\dfrac{0,125}{1}>\dfrac{0,025}{1}\) 
=> N₂ dư 
\(n_{N_2\left(p\text{ư}\right)}=n_{O_2}=0,025\left(mol\right)\\ m_{N_2\left(d\right)}=\left(0,125-0,025\right).28=2,8\left(g\right)\\ n_{NO}=2n_{O_2}=0,5\left(mol\right)\\ m_{NO}=0,5.30=15\left(g\right)\\ m_{sp}=2,8+15=17,8\left(g\right)\)

a.

\(m_{Al}=0.5\cdot27=13.5\left(g\right)\)

\(m_{CO_2}=\dfrac{6.72}{22.4}\cdot44=13.2\left(g\right)\)

\(m_{N_2}=\dfrac{5.6}{22.4}\cdot28=7\left(g\right)\)

\(m_{CaCO_3}=0.25\cdot100=25\left(g\right)\)

b.

\(m_{hh}=\dfrac{3.36}{22.4}\cdot2+\dfrac{5.6}{22.4}\cdot28+0.2\cdot44=16.1\left(g\right)\)

a) 

\(n_{SO_2}=\dfrac{m}{M}=\dfrac{3,2}{64}=0,05\left(mol\right)\\ n_{CO_2}=\dfrac{V_{\left(\text{đ}ktc\right)}}{22,4}=\dfrac{3,36}{22,4}=0,15\left(mol\right)\)

b) 

\(n_{Cl_2}=\dfrac{V_{\left(\text{đ}ktc\right)}}{22,4}=\dfrac{1,344}{22,4}=0,06\left(mol\right)\Rightarrow m_{Cl_2}=n.M=0,06.71=4,26\left(mol\right)\\ n_{Na_2CO_3}=n.M=0,5.106=53\left(g\right)\)

c) 

\(V_{N_2\left(\text{đ}ktc\right)}=n.22,4=0,25.22,4=5,6\left(l\right)\\ n_{O_2}=\dfrac{m}{M}=\dfrac{4,8}{32}=0,15\left(mol\right)\Rightarrow V_{O_2\left(\text{đ}ktc\right)}=n.22,4=0,15.22,4=3,36\left(l\right)\)

mMg = 0,5.24 = 12 gam

V_SO2 = n.22,4 = 0,25.22,4 = 5,6 lít

nN₂ = \(\dfrac{16,8}{22,4}\)= 0,75 mol , nO₂ = \(\dfrac{5,6}{22,4}\)= 0,25 mol

=> m(N₂  + O₂ ) = 0,75.28 + 0,25.32 = 29 gam

\(\overline{M}_X=16,5.2=33\left(g/mol\right)\)

\(n_X=\dfrac{1}{22,4}=\dfrac{5}{112}\left(mol\right)\)

=> \(m_X=\dfrac{5}{112}.33=1,473\left(g\right)\)

a, \(n_{CO_2}=\dfrac{0,56}{22,4}=0,025\left(mol\right)\)

PT: \(2CH_3COOH+Na_2CO_3\rightarrow2CH_3COONa+CO_2+H_2O\)

Theo PT: \(n_{CH_3COOH}=2n_{CO_2}=0,05\left(mol\right)\)

\(\Rightarrow C\%_{CH_3COOH}=\dfrac{0,05.60}{100}.100\%=3\%\)

b, Theo PT: \(n_{Na_2CO_3}=n_{CO_2}=0,025\left(mol\right)\Rightarrow m_{Na_2CO_3}=0,025.106=2,65\left(g\right)\)

\(n_{CH_3COONa}=2n_{CO_2}=0,05\left(mol\right)\Rightarrow m_{CH_3COONa}=0,05.82=4,1\left(g\right)\)

c, \(C_2H_5OH+O_2\underrightarrow{^{mengiam}}CH_3COOH+H_2O\)

Theo PT: \(n_{C_2H_5OH\left(LT\right)}=n_{CH_3COOH}=0,05\left(mol\right)\)

Mà: H = 80%

\(\Rightarrow n_{C_2H_5OH\left(TT\right)}=\dfrac{0,05}{80\%}=0,0625\left(mol\right)\)

\(\Rightarrow m_{C_2H_5OH\left(TT\right)}=0,0625.46=2,875\left(g\right)\)

\(\Rightarrow V_{C_2H_5OH}=\dfrac{2,875}{0,8}=3,59375\left(ml\right)\)

\(\Rightarrow V_{C_2H_5OH\left(10^o\right)}=\dfrac{3,59375}{10}.100=35,9375\left(ml\right)\)

\(m_{O_2}=0,5.32=16\left(g\right)\\ n_C=\dfrac{6}{12}=0,5\left(mol\right)\\ 3.C.192\left(g\right)\\n_{N_2}=\dfrac{11,2}{22,4}=0,5\left(mol\right)\\ V_{Cl_2\left(\text{đ}ktc\right)}=0,05.22,4=1,12\left(l\right)\\ 3.b.4,48\left(l\text{í}t\right) \)

 2. Tính số mol của 6g cacbon C ? 

\(n_C=\dfrac{6}{12}=0,5\left(mol\right)\)

3. Tính khối lượng của 1,2 mol CuSO4 ?

a/ 180g

b/ 190g

c/ 192g 

\(m_{CuSO_4}=1,2.160=192\left(g\right)\)

1. Tính số mol của 11,2 lít khí nitơ N2 ở đktc ?

\(n_{N_2}=\dfrac{11,2}{22,4}=0,5\left(mol\right)\)

2. Tính thể tích ở đktc của 0,05 mol khí clo Cl2 ?

\(V_{Cl_2}=0,05,22,4=1,12\left(l\right)\)

3. Thể tích của 0,2 mol khí nitơ ở đktc là bao nhiêu?

a/ 3,36 lit

b/ 4,48 lít

\(V_{N_2}=0,2.22,4=4,48\left(l\right)\)

c/ 5,6 lít