tính thể tích ở dktc của:
a.7g N
b. 12,8g SO2
c,3.10 phân tử Cl2
d. \(3,6.10^{23}\)phân tử CH4
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mSO2= 0,2.(32+16.2)= 8,8(g)
nCl2= \(\frac{0,6.10^{23}}{6.10^{23}}\)=0,1 mol
mCl2= 0,1. 35,5.2 = 7,1(g)
nN2= \(\frac{1,2.10^{23}}{6.10^{23}}\)=0,2 mol
mN2= 0,2.14.2= 5,6 (g)
=> mA= 8,8+7,1+5,6=21,5 (g)
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) \(n_{CO_2}=\dfrac{4,4}{44}=0,1\left(mol\right)=>V_{CO_2}=0,1.22,4=2,24\left(l\right)\)
\(n_{O_2}=\dfrac{3,2}{32}=0,1\left(mol\right)=>V_{O_2}=0,1.22,4=2,24\left(l\right)\)
b) \(n_{H_2O}=\dfrac{3.10^{23}}{6.10^{23}}=0,5\left(mol\right)\)
=> mH2O = 0,5.18 = 9(g)
c) \(n_{Mg}=\dfrac{12}{24}=0,5\left(mol\right)\)
=> Số nguyên tử Mg = 0,5.6.1023 = 3.1023
\(n_{Zn}=\dfrac{13}{65}=0,2\left(mol\right)\)
=> Số nguyên tử Zn = 0,2.6.1023 = 1,2.1023
Số nguyên tử Ag = 0,15.6.1023 = 0,9.1023
Số nguyên tử Al = 0,45.6.1023 = 2,7.1023
4.
a) \(V_{SO_2}=0.5\cdot22.4=11.2\left(l\right)\)
b) \(V_{CH_4}=\dfrac{3.2}{16}\cdot22.4=4.48\left(l\right)\)
c) \(V_{N_2}=\dfrac{0.9\cdot10^{23}}{6\cdot10^{23}}\cdot22.4=3.36\left(l\right)\)
5.
a) \(m_{Al}=0.1\cdot27=2.7\left(g\right)\)
b) \(m_{Cu\left(NO_3\right)_2}=0.3\cdot188=56.4\left(g\right)\)
c) \(m_{Na_2CO_3}=\dfrac{1.2\cdot10^{23}}{6\cdot10^{23}}\cdot106=21.2\left(g\right)\)
d) \(m_{CO_2}=\dfrac{8.96}{22.4}\cdot44=17.6\left(g\right)\)
e) \(m_K=0.5\cdot2\cdot39=39\left(g\right)\\ m_C=0.5\cdot12=6\left(g\right)\\ m_O=0.5\cdot3\cdot16=24\left(g\right)\)
\(n_{Cl_2}=\dfrac{3.10^{23}}{6.10^{23}}=0,5\left(mol\right)\\ m_{Cl_2}=71.0,5=35,5\left(g\right)\)
câu 3:
\(n_{CO_2}=\dfrac{V}{22,4}=\dfrac{22,4}{22,4}=1\left(mol\right)\)
\(m_{CO_2}=n.M=1.44=44\left(g/mol\right)\)
câu4:
\(n_{H_2O}=\dfrac{3.10^{23}}{6.10^{23}}=0,5\left(mol\right)\)
Câu 5:?
Câu 6:
\(\%C=\dfrac{C}{CaCO_3}=\dfrac{12}{100}.100\%=12\%\)
Câu 3:
\(n_{CO_2}=\dfrac{22.4}{2.24}=10\left(mol\right)\)
\(m=10\cdot44=440\left(g\right)\)
Câu 6:
\(\%C=\dfrac{12}{40+12+16\cdot3}=\dfrac{12}{100}=12\%\)
ta có: nCl2=\(\frac{7,1}{71}=0,1mol\)
\(V_{Cl2}=0,1.22,4=2,24\left(l\right)\)
\(n_{CO2}=\frac{8,8}{44}=0,2\left(mol\right)\)
\(V_{CO2}=0,2.22,4=4,48\left(l\right)\)
\(n_{NO2}=\frac{4,6}{46}=0,1\left(mol\right)\)
\(V_{NO2}=0,1.22,4=2,24\left(l\right)\)
\(n_{h^2}=0,1+0,2+0,1=0,4\left(mol\right)\)
\(V_{h^2}=2,24+2,24+4,48=8,96\left(l\right)\)
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)
\(n_{Fe}=\dfrac{14}{56}=0,25\left(mol\right)\)
\(n_{Ca}=\dfrac{20}{40}=0,5\left(mol\right)\)
\(n_{CaCO_3}=\dfrac{25}{100}=0,25\left(mol\right)\)
\(n_{NaOH}=\dfrac{4}{40}=0,1\left(mol\right)\)
\(n_{H_2O}=\dfrac{1,5.10^{23}}{6.10^{23}}=0,25\left(mol\right)\)
b)
\(m_{ZnSO_4}=0,25.161=40,25\left(g\right)\)
\(m_{AlCl_3}=0,2.133,5=26,7\left(g\right)\)
\(m_{Cu}=0,3.64=19,2\left(g\right)\)
\(m_{Fe_2\left(SO_4\right)_3}=0,35.400=140\left(g\right)\)
c)
\(V_{CO_2}=0,2.22,4=4,48\left(l\right)\)
\(V_{Cl_2}=0,15.22,4=3,36\left(l\right)\)
\(V_{SO_2}=0,3.22,4=6,72\left(l\right)\)
\(V_{CH_4}=0,5.22,4=11,2\left(l\right)\)
a: \(n_{Fe}=\dfrac{14}{56}=0.25\left(mol\right)\)
\(n_{Ca}=\dfrac{20}{40}=0.5\left(mol\right)\)
nN2=7\28=0,25 mol
=>VN2=0,25.22,4=5,6l
nSO2=12,8\64=0,2 mol
=>VSO2=0,2.22,4=4,48l
nCl2=3.1023\6.1023=0,5 mol
=>VCl2=0,5.22,4=11,2l
nCH4=3,6.1023\6.1023=0,6 mol
=>VCH4=0,6.22,4=13,44l