The number of copper atoms in a penny is to be calculated. The road map for the calculation of the copper atoms is to be included. Concept introduction: The SI unit for amount of substance is mol . One mole is defined as the amount of substance that contains the same number of entities such as molecules, ions, atoms as the number of atoms in 12 g of C-12 . This number is called Avogadro’s number . The value of Avogadro’s number is 6 .022 × 10 23 ( entitites/mol ) . The number of atoms of a substance can be calculated from the given mass of a substance, its molar mass, and the Avogadro’ number. The expression to calculate the number of atoms of a substance when the mass of the substance in grams is given is as follows: Number of atoms = ( Mass ( g ) ) ( 1 mol no . of grams ) ( 6.022 × 10 23 atoms 1 mol )

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Chapter 3.1, Problem 3.3BFP

Interpretation Introduction

Interpretation:

The number of copper atoms in a penny is to be calculated. The road map for the calculation of the copper atoms is to be included.

Concept introduction:

The SI unit for amount of substance is $mol$ . One mole is defined as the amount of substance that contains the same number of entities such as molecules, ions, atoms as the number of atoms in $12 g$ of $C-12$ . This number is called Avogadro’s number. The value of Avogadro’s number is $6.022×1023 (entitites/mol)$ .

The number of atoms of a substance can be calculated from the given mass of a substance, its molar mass, and the Avogadro’ number.

The expression to calculate the number of atoms of a substance when the mass of the substance in grams is given is as follows:

$Number of atoms=(Mass (g))(1 molno. of grams)(6.022×1023 atoms1 mol)$

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