\(n_{NaOH}=\dfrac{20}{40}=0,5\left(mol\right)\)

Số phân tử NaOH : \(0,5.6.10^{23}=3.10^{23}\left(Phân.tử\right)\)

mà : \(Số.phân.tửNaOH=Số.phân.tửH_2O\)

\(\Rightarrow n_{H2O}=\dfrac{3.10^{23}}{6.10^{23}}=0,5\Rightarrow m_{H2O}=0,5.18=9\left(g\right)\)

 Chúc bạn học tốt

m_SO2= 0,2.(32+16.2)= 8,8(g)

n_Cl2= \(\frac{0,6.10^{23}}{6.10^{23}}\)=0,1 mol

m_Cl2= 0,1. 35,5.2 = 7,1(g)

n_N2= \(\frac{1,2.10^{23}}{6.10^{23}}\)=0,2 mol

m_N2= 0,2.14.2= 5,6 (g)

=> m_A= 8,8+7,1+5,6=21,5 (g)

b) n_A= 0,2+0,1+0,2= 0,5 mol

M_A= \(\frac{21,5}{0,5}\)= 43

ở đkt, V_A= 0,5.24= 12 (l)

ở đktc, V_A= 0,5.22.4= 11,2 (l)

\(a.n_{CO_2}=\dfrac{18.10^{23}}{6.10^{23}}=3\left(mol\right)\\ \Rightarrow m_{CO_2}=44.3=132\left(g\right)\\ b.n_{H_2O}=\dfrac{39,6}{18}=2,2\left(mol\right)\\ c.n_{Fe}=\dfrac{12.10^{23}}{6.10^{23}}=2\left(mol\right)\)

\(CH_3COOH+2O_2\underrightarrow{t^o}2CO_2+2H_2O\)

CH3COOH có PTK là 60 

\(n_{NaOH}=\dfrac{14}{40}=0,35\left(mol\right)\\ n_{ZnO}=\dfrac{1,2.10^{23}}{6.10^{23}}=0,2\left(mol\right)\)

a) Số nguyên tử N = 1,5 . 6 . 10²³ = 9 . 10²³

b) Số phân tử H₂ = 0,5 . 6 . 10²³ = 3 . 10²³

c) Số phân tử NaOH = 0,2 . 6 . 10²³ = 1,2 . 10²³

d) Số phân tử CO₂ = 0,05 . 6 . 10²³ = 0,3 . 10²³

e) Số phân tử CuSO₄ = 0,5 . 6 . 10²³= 3 . 10²³

a. \(V_{N_2\left(ĐKTC\right)}=n_{N_2}.22,4=0,05.22,4=1,12l\)

b. \(4,4kg=4400g\)

\(\rightarrow n_{CO_2}=\frac{m_{CO_2}}{M_{CO_2}}=\frac{4400}{44}=100mol\)

\(\rightarrow V_{CO_2\left(ĐKTC\right)}=n_{CO_2}.22,4=100.22,4=2240l\)

c. \(n_{O_2}=\frac{A_{O_2}}{N}=\frac{1,2.10^{22}}{6.10^{23}}=0,02mol\)

\(\rightarrow m_{O_2}=n_{O_2}.M_{O_2}=0,02.32=0,64g\)

\(\rightarrow V_{O_2\left(ĐKTC\right)}=n_{O_2}.22,4=0,448l\)