Chapter 7 Section 3.2: Molar Mass & Percentage Composition
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Chemistry
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10th - 12th Grade
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Hard
Abby Fancsali
Used 6+ times
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10 Slides • 5 Questions
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Chapter 7 Section 3.2: Molar mass & Percentage Composition
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Recall
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Practice problem H on page 240 what is the mass in grams of 2.50 mol of oxygen gas (O2)
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Practice problem H on page 240 what is the mass in grams of 2.50 mol of oxygen gas (O2)
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Practice problem H on page 240 what is the mass in grams of 2.50 mol of oxygen gas (O2)
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Practice problem H on page 240 what is the mass in grams of 2.50 mol of oxygen gas (O2)
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Sample Problem I on Board
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Why find percentage composition?
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Sample problem J: Find the percentage composition of copper(I) sulfide Cu2S
First step: find the total molar mass of the compound Cu2S
2 Cu= 2 x 63.55
1 S= 1 x 32.07
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Sample problem J: Find the percentage composition of copper(I) sulfide Cu2S
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Chapter 7 Section 3.2: Molar mass & Percentage Composition
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