Question

a sample of crushed rock is found to have 4.8 * 10¹⁰ atoms of gold. how many moles of gold are present in this sample

Answer 1

To determine the number of moles of gold present in the sample, divide the given number of gold atoms by Avogadro's number.

Step-by-step explanation:

To determine the number of moles of gold present in the sample, you need to use Avogadro's number. Avogadro's number is the number of atoms in one mole of a substance and is equal to 6.022 × 10^23.

First, convert the given number of gold atoms to moles by dividing by Avogadro's number: 4.8 × 10^10 atoms / (6.022 × 10^23 atoms/mol) = 7.97 × 10^-14 moles.