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a, \(\overline{M}=\dfrac{0,1.44+0,2.28}{0,1+0,2}\approx33,33\left(g/mol\right)\)
b, \(\overline{M}=\dfrac{0,2.28+0,3.2}{0,2+0,3}=12,4\left(g/mol\right)\)
c, \(\overline{M}=\dfrac{0,1.28+0,2.30+0,2.44}{0,1+0,2+0,2}=35,2\left(g/mol\right)\)
d, \(\overline{M}=\dfrac{0,2.56+0,1.24+0,1.27}{0,2+0,1+0,1}=40,75\left(g/mol\right)\)
N phân tử = 1 mol phân tử
\(\Rightarrow n_{O2}=1mol;n_{N_2}=2mol;n_{CO_2}=1,5mol\)
\(\Rightarrow m_{hh}=1.32+2.28+1,5.44=154g\)
b. \(m_{hh}=0,1.56+0,2.64+0,3.65+0,25.27=44,65g\)
c. \(n_{O_2}=\dfrac{2,24}{22,4}=0,1mol\)
\(n_{H_2}=\dfrac{1,12}{22,4}=0,05mol\)
\(n_{HCl}=\dfrac{6,72}{22,4}=0,3mol\)
\(n_{CO_2}=\dfrac{0,56}{22,4}=0,025mol\)
\(\Rightarrow m_{hh}=0,1.32+0,05.2+0,3.36,5+0,025.44=15,35g\)
a, mCaO = 0,5.56 = 28 (g)
b, \(n_{CO_2}=\dfrac{6,72}{22,4}=0,3\left(mol\right)\)
c, \(n_{H_2SO_4}=\dfrac{24,5}{98}=0,25\left(mol\right)\)
d, \(V_{hhk}=0,2.22,4+0,3.22,4=11,2\left(l\right)\)
e, \(\%m_{Cu}=\dfrac{64}{64+32+16.4}.100\%=40\%\)
Bạn tham khảo nhé!
a) mCaO=nCaO.M(CaO)=0,5.56=28(g)
b) nCO2=V(CO2,dktc)=6,72/22.4=0,3(mol)
c) nH2SO4=mH2SO4/M(H2SO4)=24,5/98=0,25(mol)
d) V(hh H2,NH3)=(0,3+0,2).22,4=11,2(l)
e) %mCu/CuSO4=(64/160).100=40%
Chúc em học tốt!
Câu 24 : B
n O = 2n CO2 = 0,1.2 = 0,2(mol)
Câu 25 : D
n SO2 = 6,4/64 = 0,1(mol)
Câu 26 : C
n SO2 = 64/64 = 1(mol)
V SO2 = 1.22,4 = 22,4(lít)
Câu 27 : E
Câu 28 : D
Câu 29 A
Câu 30 : C
Câu 31: B
Câu 32 : C
Câu 33 : C
Số mol cua 11,2 g CaO la
A/ 0,1 mol
B/ 0,3 mol
C/ 0,2 mol
Câu 1:
a) \(m_{Fe_2\left(SO_4\right)_3}=0,15.400=60\left(g\right)\)
b) \(m_{MgCl_2}=0,05.95=4,75\left(g\right)\)
c) \(m_{H_2}=0,2.2=0,4\left(g\right)\)
d) \(n_{N_2}=\dfrac{4,48}{22,4}=0,2\left(mol\right)\Rightarrow m_{N_2}=0,2.28=5,6\left(g\right)\)
e) \(n_{O_2}=\dfrac{6,72}{22,4}=0,3\left(mol\right)\Rightarrow m_{O_2}=0,3.32=9,6\left(g\right)\)
Câu 2:
a) \(V_{NO_2}=0,25.22,4=5,6\left(mol\right)\)
b) \(V_{CO_2}=0,3.22,4=6,72\left(mol\right)\)
c) \(n_{Cl_2}=\dfrac{3,55}{35,5}=0,1\left(mol\right)\Rightarrow V_{Cl_2}=0,1.22,4=2,24\left(l\right)\)
d) \(n_{N_2O}=\dfrac{1,32}{44}=0,03\left(mol\right)\Rightarrow V_{N_2O}=0,03.22,4=0,672\left(l\right)\)
a) \(n_{CO_2}=\dfrac{6,72}{22,4}=0,3\left(mol\right)\)
b) \(n_{CO_2}=\dfrac{8,8}{44}=0,2\left(mol\right)\)
c) \(n_{N_2}=\dfrac{5,6}{28}=0,2\left(mol\right)\)