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2 cards from this section. Quick, good the night before a test.
Calculate the molecular mass of carbon dioxide (CO₂).
Remember to multiply the atomic mass of oxygen by its number of atoms.
What is the formula unit mass of magnesium oxide (MgO)?
Add the atomic masses of magnesium and oxygen.
What is the molecular mass of H₂O?
Think about how many atoms of each element are present.
Formula unit mass is relevant for which type of compounds?
Recall the distinction between types of chemical compounds.
Calculate the molecular mass of a compound containing 5 carbon atoms, 10 hydrogen atoms, and 2 oxygen atoms.
Use the atomic masses provided in your textbook.
An ionic compound contains 2 calcium ions (Ca²⁺, 40) and 3 oxide ions (O²⁻, 16). Calculate the formula unit mass.
Add together the contributions from calcium and oxide ions.
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