How many silver atoms are contained in a 100 gram pure silver bar?
To determine the number of silver atoms in a pure silver bar, we need to use the concept of atomic mass and Avogadro's number. Here's how you can calculate it:
1. Find the molar mass of silver: The molar mass of silver (Ag) is located on the periodic table. It is approximately 107.87 grams/mol.
2. Calculate the number of moles: Divide the mass of the silver bar (100 grams) by the molar mass of silver.
Number of moles = Mass / Molar mass
Number of moles = 100 g / 107.87 g/mol
3. Use Avogadro's number: Avogadro's number is approximately 6.022 x 10^23 atoms/mol. Multiply the number of moles (from step 2) by Avogadro's number to determine the number of silver atoms.
Number of atoms = Number of moles x Avogadro's number
4. Calculate the final result: Plug in the values into the equation from step 3 to find the number of silver atoms.
Number of atoms = Number of moles x Avogadro's number
Number of atoms = (100 g / 107.87 g/mol) x (6.022 x 10^23 atoms/mol)
By following these steps, you can determine the number of silver atoms contained in a 100 gram pure silver bar.