Answer & Explanation:
- To convert between moles and atoms, we must mention that:
<em>Every 1.0 mole of an atom or molecule contains Avogadro's no. of molecules (6.022 x 10 ²³).</em>
- If we have an atom X and has n moles, we can get the no. of atoms of X in n moles using cross multiplication.
1.0 mole of X contains → 6.022 x 10 ²³ atoms.
n moles of X contains → ??? atoms.
∴ no. of atoms in n moles of X = (n moles)(6.022 x 10 ²³) / (1.0 mole).
- If we have a compound AB₂, and has n no. of moles of the compound.
1.0 mole of AB₂ contains → 6.022 x 10 ²³ molecules.
n moles of AB₂ contains → ??? molecules.
∴ no. of molecules in n moles of compound AB₂ = (n moles)(6.022 x 10 ²³) / (1.0 mole).
- Every 1.0 molecule of AB₂ contains 1.0 atom of A and 2.0 atoms of B.
∴ no. of atoms of A in n moles of compound AB₂ = (n moles)(6.022 x 10 ²³) / (1.0 mole).
∴ no. of atoms of B in n moles of compound AB₂ = 2 [(n moles)(6.022 x 10 ²³) / (1.0 mole)].
