Câu 1
a) \(n_{Fe}=\dfrac{16,8}{56}=0,3\left(mol\right)\)
b) \(n_{H_2}=\dfrac{3,36}{22,4}=0,15\left(mol\right)\)
c) \(n_{SO_2}=\dfrac{9.10^{21}}{6.10^{23}}=0,015\left(mol\right)\)
Câu 2
a) \(m_{Ba3\left(PO4\right)2}=0,15.601=90,15\left(g\right)\)
b) \(n_{Cl_2}=\dfrac{10,08}{22,4}=0,45\left(mol\right)\)
\(m_{Cl_2}=0,45.71=31,95\left(g\right)\)
c) \(n_{Fe\left(NO_3\right)_2}=\dfrac{45.10^{21}}{6.10^{23}}=0,075\left(mol\right)\)
\(m_{Fe\left(NO3\right)2}=0,075.180=13,5\left(g\right)\)
1a) M Fe = 56 (g/mol) b) n H2 (đktc) = \(\dfrac{VH_2^{_{ }}}{22,4}\)= \(\dfrac{3,36}{22,4}\)= 0,15 (mol)
n Fe = \(\dfrac{mFe}{MFe}\) c) n SO2 = Số phân tử SO2 : N
=\(\dfrac{16,8}{56}\) = 9.1021 : 6.1023
= 0,3 (mol) = 0,015 (mol)
2a) M Ba3(PO4)2 = (137.3)+(31+16.4).2= 601 (g/mol)
m Ba3(PO4)2 = n Ba3(PO4)2 . M Ba3(PO4)2
= 0,15 . 601 = 90,15 (g)
b) n Cl = \(\dfrac{V_{Cl}}{22,4}\)=\(\dfrac{10,08}{22,4}\)= 0,45 (mol)
m Cl = n Cl . M Cl = 0,45 . 35,5 = 15,975 (g)
c) n Fe(NO3)2 = Số phân tử Fe(NO3)2 : N = 45.1021 . 6.1023= 2,7.1046