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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) \(n_A=\dfrac{2,24}{22,4}=0,1\left(mol\right)\) => MA = \(\dfrac{3}{0,1}=30\left(g/mol\right)\)
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)
\(a_1,m_{CaCO_3}=0,25.100=25(g)\\ a_2,m_{SO_2}=\dfrac{3,36}{22,4}.64=9,6(g)\\ a_3,m_{H_2SO_4}=\dfrac{9.10^{23}}{6.10^{23}}.98=147(g)\)
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) \(n_{Fe}=\dfrac{3.10^{23}}{6.10^{23}}=0,5\left(mol\right)\)
a,NTK của Cu=64
Khối lượng của 15.10^23 ng tử Cu :
64. 15.10^23=9,10.10^25(g)
b, 1 mol có 6.10^23
2,7.10^23.6.10^23=1,62.10^47(mol)
a) nCu=\(\dfrac{15.10^{23}}{6.10^{23}}=2,5\left(mol\right)\)\(\rightarrow\)mCu=2,5.64=160(g)
b)nSO2=\(\dfrac{2,7.10^{23}}{6.10^{23}}=0,45\left(mol\right)\)