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a)
b) VCO2 = 22,4 .0,175 = 3,92l.
VH2 = 22,4 .1,25 = 28l.
VN2 = 22,4.3 = 67,2l.
c) Số mol của hỗn hợp khí bằng tổng số mol của từng khí.
nhh = nCO2 + nH2 + nN2 = 0,01 + 0,02 + 0,02 = 0,05 mol
Vhh khí = (0,01 + 0,02 + 0,02) . 22,4 = 1,12l.
a, nFe= \(\dfrac{28}{56}=0,5\) mol
nCu= \(\dfrac{64}{64}=1\) mol
nAl= \(\dfrac{5,4}{27}=0,2\) mol
b, VCO2= 0,175.22,4= 3,92 (l)
VH2= 1,25.22,4= 28 (l)
VN2= 3.22,4= 67,2 (l)
c, mA= \(\dfrac{12,25}{0,125}=98\) (g/mol)
a) \(n_{Mg}=\dfrac{2,4}{24}=0,1\left(mol\right)\)
\(n_{Zn}=\dfrac{32,5}{65}=0,5\left(mol\right)\)
\(n_{Al}=\dfrac{2,7}{27}=0,1\left(mol\right)\)
\(n_{Cu}=\dfrac{19,2}{64}=0,3\left(mol\right)\)
b)
\(m_{CO_2}=44.0,5=22\left(g\right)\)
\(m_{H_2}=1,5.2=3\left(g\right)\)
\(m_{N_2}=2.28=56\left(g\right)\)
\(m_{CuO}=3.80=240\left(g\right)\)
c) \(n_{Cl_2}=\dfrac{14,2}{71}=0,2\left(mol\right)\)
\(n_{H_2}=\dfrac{4,8}{2}=2,4\left(mol\right)\)
\(n_{O_2}=\dfrac{3,2}{32}=0,1\left(mol\right)\)
=> nhh = 0,2 + 2,4 + 0,1 = 2,7 (mol)
=> Vhh = 2,7.22,4 = 60,48(l)
\(a.n_{Mg}=\dfrac{2,4}{24}=0,1\left(mol\right)\\ n_{Zn}=\dfrac{32,5}{65}=0,5\left(mol\right)\\ n_{Al}=\dfrac{2,7}{27}=0,1\left(mol\right)\\ n_{Cu}=\dfrac{19,2}{64}=0,3\left(mol\right)\)
\(b.m_{CO_2}=0,5.44=22\left(g\right)\\ m_{H_2}=1,5.2=3\left(g\right)\\ m_{N_2}=2.28=56\left(g\right)\\ m_{CuO}=3.80=240\left(g\right)\)
\(c.n_{Cl_2}=\dfrac{14,2}{71}=0,2\left(mol\right)\\ n_{H_2}=\dfrac{4,8}{2}=2,4\left(mol\right)\\ n_{O_2}=\dfrac{3,2}{32}=0,1\left(mol\right)\\\Rightarrow n_{hh}=0,2+2,4+0,1=2,7\left(mol\right)\\ \Rightarrow V_{hh}=2,7.22,4=60,48\left(l\right)\)
\(a,n_{Mg}=\dfrac{2,4}{24}=0,1(mol); n_{Zn}=\dfrac{32,5}{65}=0,5(mol)\\ n_{Al}=\dfrac{2,7}{27}=0,1(mol); n_{Cu}=\dfrac{19,2}{64}=0,3(mol)\)
\(b,m_{CO_2}=0,5.44=22(g);m_{H_2}=1,5.2=3(g)\\ m_{N_2}=2.28=56(g);m_{CuO}=3.80=240(g)\)
\(c,n_{hh}=n_{Cl_2}+n_{H_2}+n_{O_2}=\dfrac{14,2}{71}+\dfrac{4,8}{2}+\dfrac{3,2}{32}=0,2+2,4+0,1=2,7(mol)\\ V_{hh}=2,7.22,4=60,48(l)\)
1.
\(a,n_{Al}=\dfrac{5,4}{27}=0,2(mol)\\ n_{CuO}=\dfrac{8}{80}=0,1(mol)\\ n_{Fe_2O_3}=\dfrac{16}{160}=0,1(mol)\\ b,V_{CO_2}=0,25.22,4=5,6(l)\\ V_{H_2}=0,175.22,4=3,92(l)\\ V_{N_2}=1,5.22,4=33,6(l)\)
2.
\(a,n_{Al}=0,5.2=1(mol);n_{O}=0,5.3=1,5(mol)\\ \Rightarrow m_{Al}=1.27=27(g);m_{O}=1,5.16=24(g)\\ b,n_{CO_2}=\dfrac{2,2}{44}=0,05(mol)\\ \Rightarrow m_C=0,05.12=0,6(g);m_O=0,05.2.16=1,6(g)\)
lớp 8 mình ko biết nên bạn tham khảo nha
n Fe = 28/56= 0,5 mol
n cu = 6,4 / 64= 0,1 mol
n Al = 5,4 / 27 =0,2 mol
V CO2 = 0,75 . 22,4 =16,8 l
V H2 = 1,25 . 22,4 = 28 l
V N2 = 3 . 22,4 =67,2 l
chúc bạn học tốt
a)mFe=28g
MFe=56g
nFe=?
nFe=\(\dfrac{28}{56}\) =0,5mol
tương tự
nCu=\(\dfrac{64}{64}\) =1mol
nAl=\(\dfrac{5,4}{27}\) =0,2mol
b)tóm tắt
nCO2=0,175mol
V1molCO2=22,4(l)
V=?
VCO2=0,175x22,4=3,92(l)
tương tự
VH2=1,25x22,4=28(l)
VN2=3x22,4=67,2(l)
c)tóm tắt
mCO2=0,44g
MCO2=44g
V1molCO2=22,4(l)
nCO2=?
VCO2=?
nCO2=\(\dfrac{0,44}{44}\) 0,01,mol
VCO2=0,01x22,4=0,224(l)
tương tự
nH2=\(\dfrac{1,25}{2}\) 0,625mol
VH2=0,625x22,4=149(l)
nN2=\(\dfrac{0,56}{14}\) 0,04mol
VN2=0,04x22,4=0,896(l)
a)
\(m_{FeCl_3}=0,025\cdot162,5=4,0625\left(g\right)\)
\(m_{H_2O}=0,5\cdot18=9\left(g\right)\)
\(m_{Cu\left(NO_3\right)_2}=0,35\cdot188=65,8\left(g\right)\)
b)
\(V_{H_2}=0,3\cdot22,4=6,72\left(l\right)\)
\(n_{SO_2}=\dfrac{16}{64}=0,25\left(mol\right)\) \(\Rightarrow V_{SO_2}=0,25\cdot22,4=5,6\left(l\right)\)
\(n_{CO_2}=\dfrac{26,4}{44}=0,6\left(mol\right)\) \(\Rightarrow V_{CO_2}=0,6\cdot22,4=13,44\left(l\right)\)
a)
n(Fe)=28/56=0.5 mol
n(Cu)=64/64=1 mol
n(Al)=5.4/27=0.2 mol
b)
V(CO2)=0.175*22.4=3.92 lít
V(H2)=1.25*22.4=28 lít
V(N2)=3*22.4=67.2 lít
c)
n(CO2)=0.44/44=0.01 mol
n(H2)=0.04/2=0.02 mol
n(N2)=0.56/28=0.02 mol
V(hh)= (0.01+0.02+0.02)*22.4=1.12 lít
n Fe = 28/56= 0,5 mol
n cu = 6,4 / 64= 0,1 mol
n Al = 5,4 / 27 =0,2 mol
V CO2 = 0,75 . 22,4 =16,8 l
V H2 = 1,25 . 22,4 = 28 l
V N2 = 3 . 22,4 =67,2 l