tính số mol và thể tích ở đktc của 3.1023 phân tử CO2
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-Ta có:
\(m_{CO_2}=16+12,2=44\)(g)
\(n_{CO_2}=\dfrac{22}{44}=0,5\left(mol\right)\)
-\(n_{H_2}=\dfrac{3.10^{23}}{6.10^{23}}=0,5\left(mol\right)\)
\(V_{H_2}=0,5.22,4=11,2\left(l\right)\)
a)
- \(V_{CO}=n.24=0,2.24=4,8\left(l\right)\)
- \(n_{SO_3}=\dfrac{m}{M}=\dfrac{8}{80}=0,1\left(mol\right)\)
`=>` \(V_{SO_3}=n.24=0,1.24=2,4\left(l\right)\)
- \(n_{N_2}=\dfrac{\text{Số phân tử}}{6.10^{23}}=\dfrac{3.10^{23}}{6.10^{23}}=0,5\left(mol\right)\)
`=>` \(V_{N_2}=n.24=0,5.24=12\left(l\right)\)
b)
- \(m_{Fe_2O_3}=n.M=0,25.160=40\left(g\right)\)
- \(m_{Al_2O_3}=n.M=0,15.102=15,3\left(g\right)\)
- \(n_{O_2}=\dfrac{V_{\left(\text{đ}ktc\right)}}{22,4}=\dfrac{3,36}{22,4}=0,15\left(mol\right)\)
`=>` \(m_{O_2}=n.M=0,15.32=4,8\left(g\right)\)
c)
Ta có: \(\left\{{}\begin{matrix}n_{SO_2}=\dfrac{m}{M}=\dfrac{8}{64}=0,125\left(mol\right)\\n_{CO_2}=\dfrac{m}{M}=\dfrac{4,4}{44}=0,1\left(mol\right)\\n_{H_2}=\dfrac{m}{M}=\dfrac{0,1}{2}=0,05\left(mol\right)\end{matrix}\right.\)
`=>` \(n_{hh}=n_{SO_2}+n_{CO_2}+n_{H_2}=0,125+0,1+0,05=0,275\left(mol\right)\)
`=>` \(V_{hh\left(\text{đ}ktc\right)}=n_{hh}.22,4=0,275.22,4=6,16\left(l\right)\)
\(a_1.m_{CaCl_2}=n.M=0,25.111=27,75\left(g\right)\\ m_{Cu\left(OH\right)_2}=n.M=0,5.98=49\left(g\right)\\ \Rightarrow m_{hh}=m_{CaCl_2}+m_{Cu\left(OH\right)_2}=27,75+49=76,75\left(g\right)\)
\(b_1.n_{N_2}=\dfrac{V_{\left(dktc\right)}}{22,4}=\dfrac{5,6}{22,4}=0,25\left(mol\right)\\ n_{O_2}=\dfrac{V_{\left(dktc\right)}}{22,4}=\dfrac{3,36}{22,4}=0,15\left(mol\right)\\ m_{N_2}=n.M=0,25.28=7\left(g\right)\\ m_{O_2}=n.M=0,15.32=4,8\left(g\right)\\ \Rightarrow m_{hh}=m_{N_2}+m_{O_2}=7+4,8=11,8\left(g\right)\)
\(c_1.n_{H_2O}=\dfrac{3.10^{23}}{6.10^{23}}=0,5\left(mol\right)\\ n_{CO}=\dfrac{2,4.10^{23}}{6.10^{23}}=0,4\left(mol\right)\\ m_{H_2O}=n.M=0,5.18=9\left(g\right)\\ m_{CO}=n.M=0,4.28=11,2\left(g\right)\\ m_{hh}=m_{H_2O}+m_{CO}=9+11,2=20,2\left(g\right)\)
\(a_2.n_{hh}=n_{Cl_2}+n_{N_2}=0,25+0,3=0,55\left(mol\right)\\ V_{hh\left(dktc\right)}=n.22,4=0,55.22,4=12,32\left(l\right)\)
\(n_{SO_2}=\dfrac{m}{M}=\dfrac{3,2}{64}=0,05\left(mol\right)\\ n_{N_2}=\dfrac{9,8}{28}=0,35\left(mol\right)\\ n_{hh}=n_{SO_2}+n_{N_2}=0,05+0,35=0,4\left(mol\right)\\ V_{hh}=n.22,4=0,4.22,4=8,96\left(l\right)\)
a) nCO2=[(9.1023)/(6.1023)]=1,5(mol)
=> mCO2=1,5.44=66(g)
V(CO2,đktc)=1,5.22,4=33,6(l)
b) nH2=4/2=2(mol)
N(H2)=2.6.1023=12.1023(phân tử)
V(H2,đktc)=2.22,4=44,8(l)
c) N(CO2)=0,5.6.1023=3.1023(phân tử)
V(CO2,đktc)=0,5.22,4=11,2(l)
mCO2=0,5.44=22(g)
d) nN2=2,24/22,4=0,1(mol)
mN2=0,1.28=2,8(g)
N(N2)=0,1.1023.6=6.1022 (phân tử)
e) nCu=[(3,01.1023)/(6,02.1023)]=0,5(mol)
mCu=0,5.64=32(g)
Mà sao tính thể tích ta :3
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
nCO2=\(\dfrac{3.10^{23}}{6,02.10^{23}}\)=0,5(mol)
VCO2(đktc)=nCO2.22,4=0,5.22,4=11,2(lít)
phần công thức CO2 bạn tự sửa nhé.
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