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a) \(n_{NaOH}=\dfrac{8}{40}=0,2\left(mol\right)\)
b) \(n_{N_2}=\dfrac{1,8.10^{23}}{6.10^{23}}=0,3\left(mol\right)\)
=> \(m_{N_2}=0,3.28=8,4\left(g\right)\)
c) \(n_{CO_2}=\dfrac{8,8}{44}=0,2\left(mol\right)=>V_{CO_2}=0,2.22,4=4,48\left(l\right)\)
d) \(n_{H_2}=\dfrac{3,36}{22,4}=0,15\left(mol\right)\)
=> Số phân tử H2 = 0,15.6.1023 = 0,9.1023
e) \(n_{O_2}=\dfrac{4,48}{22,4}=0,2\left(mol\right)\)
f) \(n_{Cl_2}=\dfrac{3,6.10^{23}}{6.10^{23}}=0,6\left(mol\right)\)
=> VCl2 = 0,6.22,4 = 13,44(l)
g) \(n_{O_2}=\dfrac{6,72}{22,4}=0,3\left(mol\right)\)
=> mO2 = 0,3.32 = 9,6(g)
h) \(n_{K_2O}=\dfrac{18,8}{94}=0,2\left(mol\right)\)
=> Số phân tử K2O = 0,2.6.1023 = 1,2.1023
i) \(n_{CaO}=\dfrac{11,2}{56}=0,2\left(mol\right)\)
=> Số phân tử CaO = 0,2.6.1023 = 1,2.1023
nHCl = 0,2.1,5 = 0,3 (mol)
=> mHCl = 0,3.36,5 = 10,95(g)
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) \(n_{NaOH}=\dfrac{0,25.10^{24}}{6.10^{23}}=\dfrac{5}{12}\left(mol\right)=>m_{NaOH}=\dfrac{5}{12}.40=16,667\left(g\right)\)
\(a.V_{CO_2\left(dktc\right)}=0,25.22,4=5,6\left(l\right)\)
\(b.m_{Al_2O_3}=0,5.160=80\left(g\right)\)
\(a_1,m_{CaCO_3}=0,25.100=25(g)\\ a_2,m_{SO_2}=\dfrac{3,36}{22,4}.64=9,6(g)\\ a_3,m_{H_2SO_4}=\dfrac{9.10^{23}}{6.10^{23}}.98=147(g)\)
\(a.\)
\(m_{CuO}=2\cdot40=80\left(g\right)\)
\(b.\)
\(n_{CO_2}=\dfrac{8.96}{22,4}=0.4\left(mol\right)\)
\(c.\)
\(n_{CH_4}=\dfrac{1.2\cdot10^{23}}{6\cdot10^{23}}=0.2\left(mol\right)\)
\(V_{CH_4}=0.2\cdot22.4=4.48\left(l\right)\)
\(a.V_{N_2}=n.22,4=0,25.22,4=5,6\left(l\right)\)
\(b.n_{NH_3}=\dfrac{0,9.10^{23}}{6.10^{23}}=0,15\left(mol\right)\\ V_{NH_3}=n.22,4=0,15.22,4=3,36\left(l\right)\)
\(c.n_{SO_2}=\dfrac{3,2}{64}=0,05\left(mol\right)\\ V_{SO_2}=n.22,4=0,05.22,4=1,12\left(l\right)\)
a: \(V=0.25\cdot22.4=5.6\left(lít\right)\)