Question

A copper atom has a mass of 1.06 x 10 g and a penny has a mass of 2.5 g. Use this information to answer the questions below. Be sure your answers have the correct number of significant digits. What is the mass of 1 mole of copper atoms?

Answer 1

The mass of one mole of copper atoms is 63.50 g, calculated using the atomic mass of copper (63.50 g/mol) and Avogadro's number (6.02 × 10²³ atoms/mol), with four significant digits.

Step-by-step explanation:

The mass of one mole of copper atoms is determined using Avogadro's number and the atomic mass of copper. Avogadro's number, 6.02 × 10²³ atoms/mol, is the number of atoms in one mole of any substance. The atomic mass of copper, approximately 63.50 g/mol, is the mass of one mole of copper atoms.

To find the mass of one mole of copper atoms, we therefore multiply the atomic mass of copper by one mole:

63.50 g/mol × 1 mol = 63.50 g

Thus, the mass of one mole of copper atoms is 63.50 g, with the correct number of significant digits being four, as reflected by the given atomic mass.