   Chapter 2, Problem 65PS

Chapter
Section
Textbook Problem

You are given 1.0-g samples of He, Fe, Li, Si, and C. Which sample contains the largest number of atoms? Which contains the smallest?

Interpretation Introduction

Interpretation:

For the given samples, the largest and smallest numbers of atoms containing samples are needed to be determined.

Concept introduction:

Molar masses of He, Fe, Li, Si and C are 4g, 55.8g, 6.94, 28.08 and 12.01 respectively.

• Conversion formula for mass of an atom into number moles,

Numberofmoles=MassingramsMolarmass

• Equation for finding number of atoms from number of moles of an atom,

Numberofatoms=numberofmolesofatom×6.022×1023atoms/mol

Explanation

Conversion formula for mass of an atom into number moles,

Numberofmoles=MassingramsMolarmass

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