Final answer:
The necklace with a mass of 34.18g of silver contains approximately 0.317 moles of silver, calculated using the molar mass of silver.
Step-by-step explanation:
To calculate the number of moles of silver (Ag) in your grandmother's necklace, we use the molar mass of silver. The molar mass of silver is approximately 107.87 grams per mole. Therefore, we can set up the calculation as follows:
Number of moles = Mass of substance (g) / Molar mass (g/mol)
For the 34.18g of silver in the necklace:
Number of moles = 34.18g / 107.87g/mol ≈ 0.317 moles of Ag
So, the necklace contains approximately 0.317 moles of silver.