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# Moles - PowerPoint PPT Presentation

Moles. Review of Moles. Molar Mass – Mass of one mole of any substance . Found by using the masses on the periodic table. How do find the molar mass of sodium oxide?. Converting Moles to grams. Keep in mind: Moles are small numbers; grams are large numbers.

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Presentation Transcript

### Moles

Molar Mass – Mass of one mole of any substance.

Found by using the masses on the periodic table.

How do find the molar mass of sodium oxide?

Keep in mind: Moles are small numbers; grams are large numbers.

How do you convert 3.5 moles of sodium oxide to grams?

Converting Grams to Moles

How do I convert 78.5 g of sodium oxide to moles?

Ionic compounds (Na2O) are called formula units.

Molecular compounds (C2H6) are called molecules.

Atoms (Al) don’t change. Equal to atomic mass from periodic table.

1 mole of atoms/formula units/molecules = Avogadro’s number. (remember mole day???)

1 mole = 6.02 x 1023atoms/formula units/molecules

Therefore, molar mass of XY = 6.02 x 1023 molecules of XY

How do I convert 3.5 moles of sodium oxide to formula units?

P.210 – 211

# 9,13,14,15,19,20,21,23,25 (blue only)

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