Ch.1 - Intro to General ChemistryWorksheetSee all chapters
All Chapters
Ch.1 - Intro to General Chemistry
Ch.2 - Atoms & Elements
Ch.3 - Chemical Reactions
BONUS: Lab Techniques and Procedures
BONUS: Mathematical Operations and Functions
Ch.4 - Chemical Quantities & Aqueous Reactions
Ch.5 - Gases
Ch.6 - Thermochemistry
Ch.7 - Quantum Mechanics
Ch.8 - Periodic Properties of the Elements
Ch.9 - Bonding & Molecular Structure
Ch.10 - Molecular Shapes & Valence Bond Theory
Ch.11 - Liquids, Solids & Intermolecular Forces
Ch.12 - Solutions
Ch.13 - Chemical Kinetics
Ch.14 - Chemical Equilibrium
Ch.15 - Acid and Base Equilibrium
Ch.16 - Aqueous Equilibrium
Ch. 17 - Chemical Thermodynamics
Ch.18 - Electrochemistry
Ch.19 - Nuclear Chemistry
Ch.20 - Organic Chemistry
Ch.22 - Chemistry of the Nonmetals
Ch.23 - Transition Metals and Coordination Compounds

Solution: 1 mole of Si atoms contains 6.02 x 1023 atoms. 6.02 x 1023 atoms of Si have a mass of 28.1 g. How many atoms of Si are contained in a computer chip that masses 38.0 mg? (6.02 x 1023 atoms 28.1 g)

Problem

1 mole of Si atoms contains 6.02 x 1023 atoms. 6.02 x 1023 atoms of Si have a mass of 28.1 g. How many atoms of Si are contained in a computer chip that masses 38.0 mg? 

(6.02 x 1023 atoms 28.1 g)

Solution

In this problem we don't really have to do the conversion from mole to atom since a conversion factor from mass to atoms is already given. So we can simply do the calculation as: 

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