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Chapter 7 Section 3.2: Molar Mass & Percentage Composition

Chapter 7 Section 3.2: Molar Mass & Percentage Composition

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Chemistry

10th - 12th Grade

Hard

Created by

Abby Fancsali

Used 6+ times

FREE Resource

10 Slides • 5 Questions

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Chapter 7 Section 3.2: Molar mass & Percentage Composition

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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?

media

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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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