1. Calculate the molar mass of Na₂O:
* Na: 22.99 g/mol (atomic mass of sodium)
* O: 16.00 g/mol (atomic mass of oxygen)
* Molar mass of Na₂O = (2 * 22.99) + 16.00 = 61.98 g/mol
2. Calculate the number of moles of Na₂O:
* Moles = mass / molar mass
* Moles of Na₂O = 6.2 g / 61.98 g/mol = 0.100 mol
3. Determine the number of moles of sodium ions:
* Each mole of Na₂O contains 2 moles of sodium ions (from the chemical formula).
* Moles of Na⁺ = 0.100 mol Na₂O * (2 mol Na⁺ / 1 mol Na₂O) = 0.200 mol Na⁺
4. Calculate the number of sodium ions:
* Use Avogadro's number (6.022 x 10²³ ions/mol)
* Number of Na⁺ ions = 0.200 mol * 6.022 x 10²³ ions/mol = 1.20 x 10²³ sodium ions
Therefore, there are approximately 1.20 x 10²³ sodium ions in 6.2 grams of Na₂O.
