QuestionMay 12, 2025

If 0.90 g of scandium reacts with 0.48 g of oxygen, what is the formula for the scandium oxide? What is the charge on the Scion?

If 0.90 g of scandium reacts with 0.48 g of oxygen, what is the formula for the scandium oxide? What is the charge on the Scion?
If 0.90 g of scandium reacts with 0.48 g of oxygen, what is the formula for the scandium oxide? What is the charge on the Scion?

Solution
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Answer

The formula for scandium oxide is Sc_2O_3. The charge on the Sc ion is 3+. Explanation 1. Calculate moles of scandium Molar mass of Sc is 44.96 g/mol. Moles of Sc = \frac{0.90 \text{ g}}{44.96 \text{ g/mol}}. 2. Calculate moles of oxygen Molar mass of O is 16.00 g/mol. Moles of O = \frac{0.48 \text{ g}}{16.00 \text{ g/mol}}. 3. Determine mole ratio Divide moles of each element by the smallest number of moles to find the simplest ratio. 4. Write empirical formula Use the mole ratio to determine the subscripts in the formula. 5. Determine charge on Sc ion Oxygen typically forms O^{2-} ions. Balance charges based on the empirical formula.

Explanation

1. Calculate moles of scandium<br /> Molar mass of Sc is 44.96 g/mol. Moles of Sc = $\frac{0.90 \text{ g}}{44.96 \text{ g/mol}}$.<br />2. Calculate moles of oxygen<br /> Molar mass of O is 16.00 g/mol. Moles of O = $\frac{0.48 \text{ g}}{16.00 \text{ g/mol}}$.<br />3. Determine mole ratio<br /> Divide moles of each element by the smallest number of moles to find the simplest ratio.<br />4. Write empirical formula<br /> Use the mole ratio to determine the subscripts in the formula.<br />5. Determine charge on Sc ion<br /> Oxygen typically forms $O^{2-}$ ions. Balance charges based on the empirical formula.
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