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) 

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

a) \(n_{NaOH}=\dfrac{8}{40}=0,2\left(mol\right)\)

b) \(n_{N_2}=\dfrac{1,8.10^{23}}{6.10^{23}}=0,3\left(mol\right)\)

=> \(m_{N_2}=0,3.28=8,4\left(g\right)\)

c) \(n_{CO_2}=\dfrac{8,8}{44}=0,2\left(mol\right)=>V_{CO_2}=0,2.22,4=4,48\left(l\right)\)

d) \(n_{H_2}=\dfrac{3,36}{22,4}=0,15\left(mol\right)\)

=> Số phân tử H₂ = 0,15.6.10²³ = 0,9.10²³

e) \(n_{O_2}=\dfrac{4,48}{22,4}=0,2\left(mol\right)\)

f) \(n_{Cl_2}=\dfrac{3,6.10^{23}}{6.10^{23}}=0,6\left(mol\right)\)

=> V_Cl2 = 0,6.22,4 = 13,44(l)

g) \(n_{O_2}=\dfrac{6,72}{22,4}=0,3\left(mol\right)\)

=> m_O2 = 0,3.32 = 9,6(g)

h) \(n_{K_2O}=\dfrac{18,8}{94}=0,2\left(mol\right)\)

=> Số phân tử K₂O = 0,2.6.10²³ = 1,2.10²³

i) \(n_{CaO}=\dfrac{11,2}{56}=0,2\left(mol\right)\)

=> Số phân tử CaO = 0,2.6.10²³ = 1,2.10²³

n_HCl = 0,2.1,5 = 0,3 (mol)

=> m_HCl = 0,3.36,5 = 10,95(g)

1) PTHH: 2Fe₂O₃ + 3CO →4Fe + 3CO₂

2) n_co=\(\dfrac{V}{22,4}\)=\(\dfrac{3,36}{22,4}=0,15\)(mol)

-Theo PTHH, ta có:

2.n_Fe2O3=3.n_CO=4.n_Fe=3.n_CO2=3.0,15=0,45(mol)

=>n_Fe2O3=\(\dfrac{0,45}{2}=0,225\left(mol\right)\)

=>m_Fe2O3=n.M=0,225.(56.2+16.3)=36(g)

c)- Ta có: 3.n_CO2=3.0,15=0,45(mol)

=>n_CO2=\(\dfrac{0,45}{3}=0,15\left(mol\right)\)

=>V_CO2=n.22,4=0,15.22,4=3,36(lít)

\(n_{H_2}=\dfrac{22,4}{22,4}=1\left(mol\right)=>m_{H_2}=1.2=2\left(g\right)\)

\(n_{N_2}=\dfrac{3,36}{22,4}=0,15\left(mol\right)=>m_{H_2}=0,15.28=4,2\left(g\right)\)

\(n_{CO}=\dfrac{0,896}{22,4}=0,04\left(mol\right)=>m_{CO}=0,04.28=1,12\left(g\right)\)

a: \(n_{H_2}=\dfrac{V}{22.4}=1\left(mol\right)\)

b: \(n_{N_2}=\dfrac{3.36}{22.4}=0.15\left(mol\right)\)

a, khối lượng của 2,5 mol CuO là:
\(m=n.M=2,5.80=200\left(g\right)\)

b, số mol của 4,48 lít khí CO2 (đktc) là:
\(n=\dfrac{V}{22,4}=\dfrac{4,48}{22,4}=0,2\left(mol\right)\)

a.

mCuO=n.M=2,5.(1.64+1.16)= 200 mol

b.nCO₂=V/22,4=4,48:22,4=0,2 mol