There are 0.73900 moles and 4.449 x 10^23 atoms in a sample of gold that has a mass of 145.56 grams.
Using the formula below, determine the number of moles of gold in 145.56 grams of gold. (MM of gold = 196.96657 g/mol)
number of moles = mass/MM
number of moles = 145.56 g / 196.96657 g/mol
number of moles = 0.73900
Multiply the Avogadro's number to the number of moles to get the number of atoms in 145.56 grams of gold.
number of atoms = moles(Avogadro's number)
number of atoms = 0.73900 moles Au(6.02214076 × 10^23 atoms/mole)
number of atoms = 4.449 x 10^23
Learn more about converting mass to moles and atoms here: https://brainly.com/question/2285081
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