High School

How many copper atoms are in a pure copper statue with a mass of 181 kg?

Express your answer to three significant figures.

[tex]N = \text{Cu atoms}[/tex]

Answer :

Final answer:

The number of copper atoms in the pure copper statue with a mass of 181 kg is approximately 2.85 x 10^26 atoms.

Explanation:

To calculate the number of copper atoms in the statue, we need to use the formula:

Number of atoms = (mass of substance / molar mass) * Avogadro's number

First, let's convert the mass of the statue from kg to g:

Mass of statue = 181 kg * 1000 g/kg = 181,000 g

Next, we can calculate the number of copper atoms:

Number of atoms = (181,000 g / 63.55 g/mol) * (6.022 x 10^23 atoms/mol)

Calculating this expression gives us:

Number of atoms = 2.85 x 10^26 atoms

Learn more about calculating the number of atoms using mass and molar mass here:

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