Chemical reaction: 2PCl₃ + O₂ → 2POCl₃.
m(PCl₃) = 194 g.
n(PCl₃) = m(PCl₃) ÷ M(PCl₃).
n(PCl₃) = 194 g ÷ 137,33 g/mol.
n(PCl₃) = 1,412 mol.
From chemical reaction: n(PCl₃) : n(POCl₃) = 1 : 1.
n(POCl₃) = 1,412 mol.
V(POCl₃) = n(POCl₃) · Vm.
V(POCl₃) = 1,412 mol · 22,4 mol/dm³.
V(POCl₃) = 31,64 dm³ at normal pressure and temperature.
Answer:
6.098M
Explanation:
akording to m1v1/m2v2=n1/n2
N(Cu)=m(Cu)/M(Cu)
n(H₂O)=4n(Cu)/3
n(H₂O)=4m(Cu)/{3M(Cu)}
n(H₂O)=4*98.6g/{3*63.5g/mol}=2.0703≈2.1 mol
n(H₂O)=2.1 mol
