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Ch.3 - Chemical Reactions and Reaction Stoichiometry
Chapter 3, Problem 33b

What is the mass, in kilograms, of an Avogadro's number of people, if the average mass of a person is 160 lb? How does this compare with the mass of Earth, 5.98⨉1024 kg?

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Avogadro's Number

Avogadro's number, approximately 6.022 x 10^23, is the number of constituent particles, usually atoms or molecules, in one mole of a substance. This concept is fundamental in chemistry for converting between the number of particles and the amount of substance in moles, allowing for calculations involving large quantities of matter.
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Avogadro's Law

Unit Conversion

Unit conversion is the process of converting a quantity expressed in one set of units to another. In this question, it involves converting the average mass of a person from pounds to kilograms, which is essential for accurately calculating the total mass of Avogadro's number of people and comparing it to the mass of the Earth.
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Conversion Factors

Mass Comparison

Mass comparison involves evaluating the relative sizes of different masses. In this context, it requires calculating the total mass of Avogadro's number of people and comparing it to the mass of the Earth, which helps in understanding the scale of human mass relative to planetary mass and provides insight into the vastness of Earth’s mass.
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