1) 

a) \(n_{O_2}=\dfrac{33,6}{22,4}=1,5\left(mol\right)\)

b) Số phân tử oxi = 1,5.6.10²³ = 9.10²³

c) \(m_{O_2}=1,5.32=48\left(g\right)\)

2) \(n_{O_2}=\dfrac{3,2}{32}=0,1\left(mol\right)\)

=> Số mol N₂ cần lấy = 0,1.4 = 0,4 (mol)

=> m_N2 = 0,4.28 = 11,2(g)

3)

n_hh = 0,25 + 1,5 + 0,75 + 0,5 = 3 (mol)

=> V_hh = 3.22,4 = 67,2 (l)

-\(n_{O_2}=\dfrac{m_{O_2}}{M_{O_2}}=\dfrac{33,6}{22,4}=1,5\left(mol\right)\)

-Số phân tử khí oxi là:\(n.6.10^{23}=1,5.6.10^{23}=9.10^{23}\)

-\(m_{O_2}=n_{O_2}.M_{O_2}=1,5.32=48\left(g\right)\)

$n_{O_2} = \dfrac{67,2}{22,4} = 3(mol)$

Số phân tử $O_2 = 3.6.10^{23} = 18.10^{23}$ phân tử

$n_{O_2} = \dfrac{3,2}{32} = 0,1(mol) \Rightarrow n_{N_2} = 0,1.4 = 0,4(mol)$

$m_{N_2} = 0,4.28 = 11,2(gam)$

Câu 1:

\(d_{N_2/kk}=\dfrac{28}{29}\approx 0,97\\ d_{SO_2/kk}=\dfrac{80}{29}\approx 2,76\\ d_{NO_2/kk}=\dfrac{46}{29}\approx 1,59\)

Câu 2:

\(n_{CO_2}=\dfrac{0,44}{44}=0,01(mol);n_{N_2}=\dfrac{6.10^{23}}{6.10^{23}}=1(mol)\\ \Rightarrow V_{hh}=22,4(0,01+0,1+1)=24,864(l)\)

Câu 1:

\(d_{N_2/kk}=\dfrac{28}{29}=0,966\)

\(d_{SO_2/kk}=\dfrac{64}{29}=2,207\)

\(d_{NO_2/kk}=\dfrac{46}{29}=1,586\)

Câu 2:

\(n_{CO_2}=\dfrac{0,44}{44}=0,01\left(mol\right)\)

\(n_{N_2}=\dfrac{6.10^{23}}{6.10^{23}}=1\left(mol\right)\)

=> V_hh = (0,01+0,1+1).22,4 = 24,864(l)

ta có: n_Cl2=\(\frac{7,1}{71}=0,1mol\)

\(V_{Cl2}=0,1.22,4=2,24\left(l\right)\)

\(n_{CO2}=\frac{8,8}{44}=0,2\left(mol\right)\)

\(V_{CO2}=0,2.22,4=4,48\left(l\right)\)

\(n_{NO2}=\frac{4,6}{46}=0,1\left(mol\right)\)

\(V_{NO2}=0,1.22,4=2,24\left(l\right)\)

\(n_{h^2}=0,1+0,2+0,1=0,4\left(mol\right)\)

\(V_{h^2}=2,24+2,24+4,48=8,96\left(l\right)\)

b) ta có \(n_{O2}=\frac{16}{32}=0,5\left(mol\right)\)

\(n_{N2}=\frac{14}{28}=0,5\left(mol\right)\)

\(\Leftrightarrow n_{h^2}=0,5+0,5=1\left(mol\right)\)

c) vì \(S=n.6.10^{23}\Rightarrow n=\frac{S}{6.10^{23}}\)

\(n_{N2}=\frac{1,5.10^{23}}{6.10^{23}}=0,25\left(mol\right)\)

\(V_{N2}=0,25.22,4=5,6\left(l\right)\)

\(n_{CO2}=\frac{9.10^{23}}{6.10^{23}}=1,5\left(mol\right)\)

\(V_{CO2}=1,5.22,4=33,6\left(l\right)\)

chúc bạn học tốt like mình nha

a, Số mol của 2,8g N2

\(n_{N2}\)=\(\dfrac{m}{M}\)=\(\dfrac{2,8}{28}\)=0,1 (mol)

b, Thể tích 0,75 mol CO2(đktc)

\(V_{CO2}\)=0,75.22,4=16,8 lít

c, Khối lượng của 0,5 mol Fe

M \(m_{Fe}\)=0,5.56=28g

d, Số mol của 1,12 lít khí H2

\(n_{H2}\)=\(\dfrac{1,12}{22,4}\)=0,05 (mol)

e, Khối lượng của \(9.1^{23}\) phân tử \(Ba_{\left(NO3\right)2}\)

  \(m_{Ba\left(NO3\right)2}\)=\(\dfrac{9.10^{23}}{6.10^{23}}\)=1,5 (mol)

SOS

a) nH2SO4= 19,6/98=0,2(mol)

nCO2= (3.10²³)/(6.10²³)=0,5(mol)

nO2= 1,12/22,4=0,05(mol)

b) nN2=5,6/28=0,2(mol)

nO2=(1,8.10²³)/(6.10²³)=0,3 (mol)

=> V(khí đktc)=V(N2,đktc)+V(O2,đktc)=0,2.22,4+0,3.22,4=11,2(l)

a) nNaOH=20/40=0,5(mol)

nN2=1,12/22,4=0,05(mol)

nNH3= (0,6.10²³)/(6.10²³)=0,1(mol)

b) mAl2O3= 102.0,15= 15,3(g)

mSO2= nSO2 . M(SO2)= V(CO2,đktc)/22,4 . 64= 6,72/22,4. 64= 0,3. 64= 19,2(g)

mH2S= nH2S. M(H2S)= (0,6.10²³)/(6.10²³) . 34=0,1. 34 = 3,4(g)

c) V(CO2,đktc)=0,2.22.4=4,48(l)

nSO2=16/64=0,25(mol) -> V(SO2,đktc)=0,25.22,4=5,6(l)

nCH4=(2,1.10²³)/(6.10²³)=0,35(mol) -> V(CH4,đktc)=0,35.22,4=7,84(l)

a,n=m/M=20/(23+17)20:40=0,5(mol)

n=V/22,4=11,2/22,4=0,5(mol)

n=số pt/số Avogađro=6.10^23:6.10^23=1

\(n_{N_2}=\dfrac{9.10^{23}}{6.10^{23}}=1,5\left(mol\right)\)