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a.

\(m_{H_2SO_4}=0.5\cdot98=49\left(g\right)\)

\(m_{NaOH}=0.2\cdot40=8\left(g\right)\)

\(m_{Ag}=0.1\cdot108=10.8\left(g\right)\)

b.

\(n_{SO_2}=\dfrac{15\cdot10^{23}}{6\cdot10^{23}}=2.5\left(mol\right)\)

\(m_{SO_2}=2.5\cdot64=160\left(g\right)\)

1)

a) \(n_{HCl}=\dfrac{7,3}{36,5}=0,2\left(mol\right)\)

b) \(n_{CH_4}=\dfrac{8,96}{22,4}=0,4\left(mol\right)\)

c) \(n_{H_2O}=\dfrac{15.10^{23}}{6.10^{23}}=2,5\left(mol\right)\)

2)

a) \(n_A=\dfrac{2,24}{22,4}=0,1\left(mol\right)\) => M_A = \(\dfrac{3}{0,1}=30\left(g/mol\right)\)

b) \(d_{A/O_2}=\dfrac{30}{32}=0,9375\)

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,n=m/M=20/(23+17)20:40=0,5(mol)

n=V/22,4=11,2/22,4=0,5(mol)

n=số pt/số Avogađro=6.10^23:6.10^23=1

\(a_1,m_{CaCO_3}=0,25.100=25(g)\\ a_2,m_{SO_2}=\dfrac{3,36}{22,4}.64=9,6(g)\\ a_3,m_{H_2SO_4}=\dfrac{9.10^{23}}{6.10^{23}}.98=147(g)\)

a) \(n_{N_2}=\dfrac{4,48}{22,4}=0,2\left(mol\right)\)

b) \(n_{SO_2}=\dfrac{6,4}{64}=0,1\left(mol\right)\)

c) \(n_{Fe}=\dfrac{3.10^{23}}{6.10^{23}}=0,5\left(mol\right)\)