Answer:
To determine the number of atoms in a sample of copper, we need to use the concept of molar mass and Avogadro's number. Here's a step-by-step guide on how to calculate it:
1. Find the molar mass of copper. The molar mass represents the mass of one mole of a substance. The atomic mass of copper is approximately 63.55 g/mol.
2. Convert the mass of the sample to moles. To do this, divide the mass of the sample (820 g) by the molar mass of copper (63.55 g/mol):
Number of moles = Mass of sample / Molar mass
= 820 g / 63.55 g/mol
3. Calculate the number of atoms in the sample using Avogadro's number. Avogadro's number is approximately 6.022 x 10^23 atoms/mol.
Number of atoms = Number of moles x Avogadro's number
= (820 g / 63.55 g/mol) x (6.022 x 10^23 atoms/mol)
4. Perform the calculation to find the number of atoms in the sample:
Number of atoms = (820 g / 63.55 g/mol) x (6.022 x 10^23 atoms/mol)
Make sure to carry out the multiplication and division correctly using a calculator or spreadsheet software.
By following these steps, you can calculate the number of atoms in the sample of copper.
Step-by-step explanation: