Step-by-step explanation:
To determine the number of atoms in 3.09 moles of scandium, we can use Avogadro's number, which is approximately 6.022 x 10^23 particles per mole.
First, we need to calculate the total number of particles in 3.09 moles of scandium:
Number of particles = number of moles x Avogadro's number
Number of particles = 3.09 moles x 6.022 x 10^23 particles/mole
Number of particles = 1.860818 x 10^24 particles
Therefore, there are approximately 1.860818 x 10^24 atoms in 3.09 moles of scandium.