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\(a.m_{CuSO_4}=n.M=0,3.160=48\left(g\right)\)
\(b.n_{CaCO_3}=\dfrac{9.10^{23}}{6.10^{23}}=1,5\left(mol\right)\\ m_{CaCO_3}=n.M=1,5.100=150\left(g\right)\)
\(c.n_{MgCl_2}=\dfrac{1,5.10^{22}}{6.10^{23}}=0,025\left(mol\right)\\ \Rightarrow m_{MgCl_2}=n.M=0,025.95=2,375\left(g\right)\)
a) \(m_{CuSO_4}=0,3.160=48\left(g\right)\)
b) \(n_{CaCO_3}=\dfrac{9.10^{23}}{6.10^{23}}=1,5\left(mol\right)=>m_{CaCO_3}=1,5.100=150\left(g\right)\)
c) \(n_{MgCl_2}=\dfrac{1,5.10^{22}}{6.10^{23}}=0,025\left(mol\right)=>m_{MgCl_2}=0,025.95=2,375\left(g\right)\)
e) \(n_{CO_2}=\dfrac{2,24}{22,4}=0,1\left(mol\right)=>m_{CO_2}=0,1.44=4,4\left(g\right)\)
f) \(n_{NaOH}=\dfrac{0,25.10^{24}}{6.10^{23}}=\dfrac{5}{12}\left(mol\right)=>m_{NaOH}=\dfrac{5}{12}.40=16,667\left(g\right)\)
a) Số nguyên tử có trong 0,1 H là
\(6.10^{23}.0,1=6.10^{22}\)
b) Số nguyên tử có trong 10 mol H2O
\(6.10^{23}.10=60.10^{23}\)
c) Số nguyên tử có trong 0,24 mol Fe là
\(6.10^{23}.0,24=144.10^{21}\)
Làm một cái rồi tương tự nhé
\(a,\%C=\dfrac{12}{44}=27,27\%\\ \%O=100\%-27,27\%=72,73\%\)
\(a,CO\\ \%m_C=\dfrac{M_C}{M_C+M_O}.100\%=\dfrac{12}{12+16}.100\approx42,857\%\\ \Rightarrow\%m_O\approx100\%-42,857\%\approx57,143\%\\ MgCl_2\\ \%m_{Mg}=\dfrac{M_{Mg}}{M_{Mg}+2.M_{Cl}}.100\%=\dfrac{24}{24+2.35,5}.100\approx25,263\%\\ \Rightarrow\%m_{Cl}\approx100\%-25,263\%\approx74,737\%\\ C_6H_6\\ \%m_C=\dfrac{6.M_C}{6.M_C+6.M_H}.100\%=\dfrac{6.12}{6.12+6.1}.100\approx92,308\%\\ \Rightarrow\%m_H\approx100\%-92,308\%\approx7,692\%\)
a) \(m_{H_2SO_4}=0,35.98=34,3\left(g\right)\)
b) \(m_{Na_2CO_3}=\dfrac{5,4.10^{23}}{6.10^{23}}.106=95,4\left(g\right)\)
c) \(m_{Ca\left(NO_3\right)_2}=\dfrac{2,4.10^{23}}{6.10^{23}}.164=65,6\left(g\right)\)
a) \(m_{H_2SO_4}=98.0,35=34,3\left(g\right)\)
b) \(n_{Na_2CO_3}=\dfrac{5,4.10^{23}}{6.10^{23}}=0,9\left(mol\right)\)
=> \(m_{Na_2CO_3}=106.0,9=95,4\left(g\right)\)
c) \(n_{Ca\left(NO_3\right)_2}=\dfrac{2,4.10^{23}}{6.10^{23}}=0,4\left(mol\right)\\ m_{Ca\left(NO_3\right)_2}=0,4.164=65,6\left(g\right)\)
\(a_1,m_{CaCO_3}=0,25.100=25(g)\\ a_2,m_{SO_2}=\dfrac{3,36}{22,4}.64=9,6(g)\\ a_3,m_{H_2SO_4}=\dfrac{9.10^{23}}{6.10^{23}}.98=147(g)\)
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) mBr = 1.80 = 80 (g)
b) mC6H12O6 = 1.180=180(g)
c) mFe3O4 = 1.232= 2332(g)
\(a.m_{Br}=1.80=80\left(g\right)\\ b.m_{C_6H_{12}O_6}=1.180=180\left(g\right)\\ c.m_{Fe_3O_4}=\dfrac{N}{6.10^{23}}.232\left(g\right)\)
a) mCuSO4 = 0,3.160 = 48(g)
b) \(n_{CaCO_3}=\dfrac{9.10^{23}}{6.10^{23}}=1,5\left(mol\right)\)
=> mCaCO3 = 1,5.100 = 150(g)
c) \(n_{MgCl2}=\dfrac{1,5.10^{22}}{6.10^{23}}=0,025\left(mol\right)\)
=> mMgCl2 = 0,025.95 = 2,375(g)