Download - The Mole Hill
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The Mole HillGRAMS TO MOLES TO MOLES TO GRAMS
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Objective 5-6
SWBAT calculate molar mass and use it to convert between grams and moles.
(Yes, this is the same objective as last week)
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Grams to Moles
Review: Use molar mass!How many moles of H2O do I have in
25 grams of H2O?
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Moles to Grams
Review: Use molar mass!How many grams of H2O do I have in
2 moles of H2O?
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Moles to Moles
We can use subscripts in chemical formulas as a conversion factor too.
For example: H2O gives us the conversion factors:
2 mol H = 1 mol H2O1 mol O = 1 mol H2O
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Example
How many moles of hydrogen are in 2 moles of H2O?
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Example
How many moles of water can I make with 25 moles of hydrogen?
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Practice
How many moles of oxygen are in 3 moles of SO4?
How many moles of SO4 can I make with 10 moles of sulfur?
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The Mole Hill
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The Mole Hill
Note: You can NOT convert straight from grams to grams.
You MUST go:grams moles moles grams
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Example
How many moles of H2O are in 20 grams of H2O?
How many moles of H are in 20 grams of H2O?
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Example
How many grams of H are in 20 grams of H2O?
How many grams of O are in 45 grams of H2SO4?
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Practice
How many grams of H are in 40 grams of H2SO4?
How many grams of H2SO4 are in 100 grams of S?