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Chapter 7 Questions and Problems
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1~2, 7~10, 13~21, 24~27, 31~36, 41~42, 46~48,
50~51, 53, 55~57, 60~62, 68, 76, 83~85, 89
and p. 190 A~D
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Answer in complete sentences.....letter answers
are insufficient
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Show all work for problems
- No Units= No Credit
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Chapter 7 Objectives
- to describe how Avogadro's number is related to a mole of
any substance
- to calculate the mass of a mole of any substance
- to use the molar mass to converrt between mass and moles
of a substance
- to use the mole to convert among measurements of mass, volume,
and number of particles
- to calculate the percent composition of a substance from
its chemical formula or experimental data
- to derive the empirical formula and the molecular formula
of a compound from experimental data
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Chapter 7 Outline Framework: Use Concept
Summary Page 197 as an aid
- The Mole: Measurement of Matter
- What is a mole?
- Number of particles in a mole
- Mass of a mole of an element
- Mass of a mole of a compound
- Mole~Mass and Mole~Volumen Relationships
- Molar mass of a substance
- Mole road map
- Percent Composition and Chemical Formulas
- Calculating the percent composition of a compound
- Using percent as a conversion factor
- Calculating empirical formulas
- Calculating molecular formulas
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Chapter 7 Terms:
- Avogadro's number
- empirical formula
- gram atomic mass
- gram formula mass
- gram molecular mass
- molar mass
- molar volume
- mole
- percent composition
- representative particle
- standard temperature and pressure (STP)
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