Deter- mine how many moles of vitamin a2 contain the same number of atoms as 1.000 mol vitamin a.

1.041 mol

Explanation:

1.000 mol of vitamin A (C₂₀H₃₀O) has 20 + 30 + 1 = 51 moles of atoms. The moles of atoms in 1.000 mol of vitamin A are:

1.000 mol Vit A × (51 mol Atoms/ 1 mol Vit A) = 51.00 mol Atoms

If vitamin A2 has the same number of atoms, it also has the same number of moles of atoms, that is, 51.00 moles of atoms.

1 mol of vitamin A2 (C₂₀H₂₈O) has 20 + 28 + 1 = 49 moles of atoms. The moles of vitamin A2 that contains 51.00 moles of atoms are:

51.00 mol Atoms × (1 mol Vit A2/49 mol Atoms) = 1.041 mol Vit A2

Based on the Modern Periodic table, there is an increase in the electropositivity of the atom down the group as well as increases across a period. On comparing the electropositivities of the mentioned oxides central atom, it is seen that Ca is most electropositive followed by Al, Si, C, P, and S is the least electropositive.  

With the decrease in the electropositivity, there is an increase in the acidity of the oxides. Thus, the increasing order of the oxides from the least acidic to the most acidic is:  

CaO > Al2O3 > SiO2 > CO2 > P2O5 > SO3. Hence, CaO is the least acidic and SO3 is the most acidic.