How many dozens of copper atoms are in a penny.?

There is 2.5 .10²¹ dozen  of copper atoms are in a penny

Stochiometry in Chemistry learns about chemical reactions mainly emphasizing quantitative, such as calculation of volume, mass, number, which is related to the number of ions, molecules, elements etc.

In chemical calculations, the reaction can be determined, the number of substances that can be expressed in units of mass, volume, mole, or determine a chemical formula, for example the substance level or molecular formula of hydrate.

A mole is a unit of many particles (atoms, molecules, ions) where 1 mole is the number of particles contained in a substance that is the same amount as many atoms in 12 gr C-12

1 mole = 6.02.10²³ particles

While the number of moles can also be obtained by dividing the mass (in grams) with

While the number of moles can also be obtained by dividing the mass (in grams) with

The complete question must be :

A pure copper penny contains approximately 3.0. 10²² copper atoms.

1 doz = 12

1 gross = 144

1 ream = 500

1 mol = 6.022 . 10²³

Use these definitions to determine the following:

How many dozens of copper atoms are in a penny.

Because there is 12 atoms for 1 dozen then , in a penny

3.0. 10²² : 12 atoms = 2.5 .10²¹ dozen

Avogadro's number

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carbon atoms in 1.50 g of butane

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a mole and Avogadro’s number

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Keywords: mole, Avogadro’s number, a penny, copper, atoms