Tính số mol của:
a/ 62g photpho
b/ 95, 48g khí CO2
c/ 9.10^23 phân tử khí N2
d/ 6,72l khí CH4 ( đktc )
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\(a,V_{SO_3}=n\cdot22,4=\dfrac{4}{32+16\cdot3}\cdot22,4=1,12\left(l\right)\\ b,V_{CO_2}=n\cdot22,4=\dfrac{22}{12+16\cdot2}\cdot22,4=11,2\left(l\right)\\ c,n_{H_2}=\dfrac{12\cdot10^{-23}}{6\cdot10^{-23}}=2\left(mol\right)\\ \Rightarrow V_{H_2}=2\cdot22,4=44,8\left(l\right)\\ d,V_{N_2}=0,025\cdot22,4=0,56\left(l\right)\)
\(a,n_{CO_2}=\dfrac{m_{CO_2}}{M_{CO_2}}=\dfrac{11}{44}=0,25\left(mol\right)\\ b,n_{H_2}=\dfrac{9.10^{23}}{6.10^{23}}=1,5\left(mol\right)\\ V_{H_2\left(đktc\right)}=1,5.22,4=33,6\left(l\right)\)
a. \(n_{Ag}=\dfrac{1,8.10^{25}}{6.10^{23}}=30\left(mol\right)\)
b. \(n_{CO_2}=\dfrac{59,4}{44}=1,35\left(mol\right)\)
c. \(n_{K_2O}=\dfrac{4,2.10^{22}}{6.10^{23}}=0,07\left(mol\right)\)
d. \(n_{CuSO_4}=\dfrac{18.10^{23}}{6.10^{23}}=3\left(mol\right)\)
e. \(n_{SO_2}=\dfrac{10,08}{22,4}=0,45\left(mol\right)\)
g. \(n_{Fe_3O_4}=\dfrac{52,2}{232}=0,225\left(mol\right)\)
h. \(n_{O_2}=\dfrac{6,72}{22,4}-0,3\left(mol\right)\)
i. \(n_{N_2}=\dfrac{13,6}{22,4}\approx0,6\left(mol\right)\)
\(a,n_{H_2O}=\dfrac{1,8}{18}=0,1(mol)\\ n_{H_2}=\dfrac{5,6}{22,4}=0,25(mol)\\ n_{Cu}=\dfrac{9.10^{23}}{6.10^{23}}=1,5(mol)\\ m_{O_2}=2.32=64(g)\\ V_{O_2}=2.22,4=44,8(l)\)
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) \(n_{NaOH}=\dfrac{0,25.10^{24}}{6.10^{23}}=\dfrac{5}{12}\left(mol\right)=>m_{NaOH}=\dfrac{5}{12}.40=16,667\left(g\right)\)
\(a.V_{N_2}=n.22,4=0,25.22,4=5,6\left(l\right)\)
\(b.n_{NH_3}=\dfrac{0,9.10^{23}}{6.10^{23}}=0,15\left(mol\right)\\ V_{NH_3}=n.22,4=0,15.22,4=3,36\left(l\right)\)
\(c.n_{SO_2}=\dfrac{3,2}{64}=0,05\left(mol\right)\\ V_{SO_2}=n.22,4=0,05.22,4=1,12\left(l\right)\)
a) \(n_P=\dfrac{62}{31}=2\left(mol\right)\)
b) \(n_{CO_2}=\dfrac{95,48}{44}=2,17\left(mol\right)\)
c) \(n_{N_2}=\dfrac{9.10^{23}}{6.10^{23}}=1,5\left(mol\right)\)
d) \(n_{CH_4}=\dfrac{6,72}{22,4}=0,3\left(mol\right)\)