a) As 1 formula unit of MgCl2 contains ine ion of Mg2+ then
"N(Mg^{2+}) = N(MgCl_2)= 5.85\\times10^{20} ions"
b)
"n(MgCl_2)=\\frac{N}{N_A} = \\frac{5.85 \\times10^{20}}{6.022\\times10^{23}} = 9.71\\times 10^{-24} mol"c)
"m(MgCl_2)= n\\times M = 9.71\\times10^{-4}\\times95.21 = 9.25\\times10^{-2}g"
Comments
Leave a comment