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Using Molar Mass to Find the Grams of Chemical Needed For a Reaction

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Cancelling Units Remember: Converting 2g to mg ?mg = 2g x 1000mg = 2000mg 1g

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Cancelling Units Remember: Converting 2g to mg ?mg = 2g x 1000mg = 2000mg 1g

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Molar mass and grams Same Method: Converting 2g O2 to moles O2 ?mol = 2g O2 X

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Molar mass and grams Same Method: Converting 2g O2 to moles O2 ?mol = 2g O2 X 1mol = 0.0625 mols O2 32.0g

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Molar Mass and Grams Same Method: Converting 2g O2 to moles O2 ?mol = 2g O2 X 1mol = 0.0625 mols O2 32.0g Correct for Certainty = 0.06 mols O2

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Molar Mass and Grams Converting 4mols CaO to g CaO ?g CaO = 4mols CaO X

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Molar Mass and Grams Converting 4mols CaO to g CaO ?g CaO = 4mols CaO X 56.1g = 224.4g CaO 1mol

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Molar Mass and Grams Converting 4mols CaO to g CaO ?g CaO = 4mols CaO X 56.1g = 224.4g O2 1mol Correct for Certainty = 200g

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Try a few Convert 5.0g N2 to mols ?mols = 5.0g N2

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Try a few Convert 5g N2 to mols ?mols = 5.0g N2 X 1 mol = 0.18mol N2 28.0g

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Try a few Convert 10mol ZnCl2 to g

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Try a few Convert 10mol ZnCl2 to g ?g = 10mol ZnCl2 X 136.4g = 1364g ZnCl2 1mol Correct for Certainty = 1300g ZnCl2

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Assignment Worksheet: Calculating Moles and Grams using Molar Mass

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