Tính khối lượng của
a, 0,5 mol H2SO4
b, 0,25 N phân tử NaOH
c, 9.1023 phân tử SO2
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\(a_1,m_{CaCO_3}=0,25.100=25(g)\\ a_2,m_{SO_2}=\dfrac{3,36}{22,4}.64=9,6(g)\\ a_3,m_{H_2SO_4}=\dfrac{9.10^{23}}{6.10^{23}}.98=147(g)\)
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) mN = 0,5 .14 = 7g.
mCl = 0,1 .35.5 = 3.55g
mO = 3.16 = 48g.
b) mN2 = 0,5 .28 = 14g.
mCl2 = 0,1 .71 = 7,1g
mO2 = 3.32 =96g
c) mFe = 0,1 .56 =5,6g mCu = 2,15.64 = 137,6g
mH2SO4 = 0,8.98 = 78,4g.
mCuSO4 = 0,5 .160 = 80g
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)
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) \(m_K=0.5\cdot2\cdot39=39\left(g\right)\\ m_C=0.5\cdot12=6\left(g\right)\\ m_O=0.5\cdot3\cdot16=24\left(g\right)\)
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)
\(a.V_{CO_2\left(dktc\right)}=0,25.22,4=5,6\left(l\right)\)
\(b.m_{Al_2O_3}=0,5.160=80\left(g\right)\)
\(a.m_{CuSO_4}=n.M=0,3.160=48\left(g\right)\)
\(b.n_{CaCO_3}=\dfrac{9.10^{23}}{6.10^{23}}=1,5\left(mol\right)\\ m_{CaCO_3}=n.M=1,5.100=150\left(g\right)\)
\(c.n_{MgCl_2}=\dfrac{1,5.10^{22}}{6.10^{23}}=0,025\left(mol\right)\\ \Rightarrow m_{MgCl_2}=n.M=0,025.95=2,375\left(g\right)\)
Bài 7:
\(a.m_{Fe}=0,5.56=28\left(g\right)\\ b.n_{p.tử}=\dfrac{6.10^{23}}{6.10^{23}}=1\left(mol\right)\\ m_{CO_2}=44.1=44\left(g\right)\\ m_{Al_2O_3}=1.102=102\left(g\right)\\ m_{C_6H_{12}O_6}=180.1=180\left(g\right)\\ m_{H_2SO_4}=98.1=98\left(g\right)\)
Bài 8:
\(a.n_{Ca}=\dfrac{112}{40}=2,8\left(mol\right)\\ b.m_{HCl}=36,5.0,5=18,25\left(g\right)\\ c.n_{H_2SO_4}=\dfrac{49}{98}=0,5\left(mol\right)\)
mH2SO4=0.5✖ (2+32+64)=19.6g
mNaOH=0.25✖ (23+16+1)=10g
nSO2=(9✖ 1023)/(6✖ 1023)=1.5 mol
mSO2=1.5✖ (32+32)=96g
a.mH2SO4=0,5.98=49(g)
b) mNaOH=0,25.40=10(g)
c)nSO2=\(\dfrac{9.10^{23}}{6.10^{23}}=1,5\)(mol)
mSO2=1,5.64=96(g)