Ta có: \(m_C=1,5.1000.90\%=1350\left(g\right)\)

\(n_C=\dfrac{1350}{12}=112,5\left(mol\right)\)

PT: \(C+O_2\underrightarrow{t^o}CO_2\)

Theo PT: \(n_{O_2}=n_C=112,5\left(mol\right)\)

\(\Rightarrow V_{O_2}=112,5.22,4=2520\left(l\right)\)

\(V_{kk}=V_{O_2}.5=12600\left(l\right)\)

Khối lượng C chứa trong 1 tấn than:

PTHH: \(C+O_2\xrightarrow[]{t^o}CO_2\)

           12---32-------gam

           0,96--x-------tấn

\(\Rightarrow x=\dfrac{0,96.32}{12}=2,56\left(\text{tấn}\right)\)

→⎧⎪ ⎪⎨⎪ ⎪⎩nC=60012=50(mol)nS=832=0,25(mol)→{nC=60012=50(mol)nS=832=0,25(mol)

PTHH:

C + O₂ ---t^o----> CO₂

_{50.....50.......................................(mol)}

S + O₂ ----t^o---> SO₂

^{0,25...0,25 ............................................(mol)}

→ VO2VO2 _{(cần dùng)} = (50 + 0,25) . 22,4 = 1125,6 (l)

=>Vkk=1125.6.5=5628l

a, Trong \(3,6kg\) than có: 

\(3,6.97,5\%=3,51kg=3510g\) \(C\)

\(\Rightarrow n_C=292,5mol\)

\(3,6.0,5\%=0,018kg=18g\) \(S\)

\(\Rightarrow n_S=0,5625mol\)

Còn lại là tạp chất không cháy 

\(PTHH:C+O_2\underrightarrow{t^0}CO_2\)

\(\Rightarrow n_{O_2}=n_{CO_2}=292,5mol\)

\(PTHH:S+O_2\underrightarrow{t^0}SO_2\)

\(\Rightarrow n_{O_2}=n_{SO_2}=0,5625mol\)

\(V_{O_2}=\left(292,5+0,5625\right).22,4=6564,6l\)

=> V kk= 6564,6:20%= 32 823l 

b, \(V_{CO_2}=292,5.22,4=6552l\)

\(V_{SO_2}=0,5625.22,4=12,6l\)

a)

\(m_{MgCl_2}=\dfrac{50.4}{100}=2\left(g\right)\Rightarrow m_{H_2O}=50-2=48\left(g\right)\)

b)

\(n_S=\dfrac{6,4}{32}=0,2\left(mol\right)\)

PTHH: S + O₂ --t^o--> SO₂

           0,2->0,2

=> V_O2 = 0,2.22,4 = 4,48 (l)

=> V_kk = 4,48 : 20% = 22,4 (l)

a.\(m_{MgCl_2}=\dfrac{50.4}{100}=2g\)

\(m_{H_2O}=50-2=48g\)

b.\(n_S=\dfrac{6,4}{32}=0,2mol\)

\(S+O_2\rightarrow\left(t^o\right)SO_2\)

0,2  0,2                             ( mol )

\(V_{kk}=V_{O_2}.5=\left(0,2.22,4\right).5=22,4l\)

 C_{nguyên chất} = (100%-10%).1000 = 900 (g)

\(n_C=\dfrac{900}{12}=75\left(mol\right)\)

PTHH: C + O₂ ---t^o→ CO₂

Mol:    75    75

\(V_{O_2}=75.22,4=1680\left(l\right)\)

\(m_{CO_2}=75.44=3300\left(g\right)\)

1) 

mC = 5000*0.9 = 4500 (g) 

nC = 4500/12 = 375 (mol) 

C + O2 -to-> CO2 

375__375 

Vkk = 5VO2 = 375*22.4*5 = 42000(l) 

2) 

nP = 6.2/31 = 0.2 (mol) 

nO2 = 8.96/22.4 = 0.4 (mol) 

4P + 5O2 -to-> 2P2O5 

0.2___0.25_____0.1 

mP2O5 = 0.1*142=14.2 (g) 

3) 

nFe = 14/56 = 1/4 (mol) 

nO = 6/16 = 3/8 (mol) 

CT : Fe_xO_y 

x : y = 1/4 : 3/8 = 2 : 3 

CT : Fe₂O₃

B1:

\(n_C=\dfrac{96\%.14.1000}{12}=1120\left(mol\right)\\ n_S=\dfrac{2,56\%.14.1000}{32}=11,2\left(mol\right)\\ C+O_2\rightarrow\left(t^o\right)CO_2\\ S+O_2\rightarrow\left(t^o\right)SO_2\\ n_{SO_2}=n_S=11,2\left(mol\right)\\ n_{CO_2}=n_C=1120\left(mol\right)\\ V_{CO_2\left(đktc\right)}=1120.22,4=25088\left(l\right)\\ n_{SO_2\left(đktc\right)}=11,2.22,4=250,88\left(l\right)\)

B2:

\(n_{C_2H_6}=\dfrac{1,8.\left(100\%-2\%\right).1000}{22,4}=78,75\left(mol\right)\\ C_2H_6+\dfrac{7}{2}O_2\rightarrow\left(t^o\right)2CO_2+3H_2O\\ n_{O_2\left(đktc\right)}=\dfrac{7}{2}.78,75=275,625\left(mol\right)\\ V_{O_2\left(đktc\right)}=275,625.22,4=6174\left(l\right)=6,174\left(m^3\right)\)

4P (0,2 mol) + 5O₂ (0,25 mol) \(\underrightarrow{t^o}\) 2P₂O₅.

a) Thể tích không khí cần dùng ở đktc là 0,25.22,4.5=28 (lít).

b) 2KMnO₄ (0,5 mol) \(\underrightarrow{t^o}\) K₂MnO₄ + MnO₂ + O₂ (0,25 mol).

Khối lượng cần tìm là 0,5.158=79 (g).

a.\(n_P=\dfrac{6,2}{31}=0,2mol\)

\(4P+5O_2\rightarrow\left(t^o\right)2P_2O_5\)

0,2   0,25                          ( mol )

\(V_{kk}=V_{O_2}.5=\left(0,25.22,4\right).5=28l\)

b.\(2KMnO_4\rightarrow\left(t^o\right)K_2MnO_4+MnO_2+O_2\)

       0,5                                                      0,25  ( mol )

\(m_{KMnO_4}=0,5.158=79g\)