Answer:
1.505 x 10^23 atoms in 0.25 moles of silicon.
Step-by-step explanation:
The number of atoms in 0.25 moles of silicon can be calculated as follows:
1 mole of any substance contains Avogadro's number of atoms. Avogadro's number is approximately 6.022 x 10^23 atoms/mole.
So, if we have 0.25 moles of silicon, the number of atoms can be calculated as follows:
0.25 moles x (6.022 x 10^23 atoms/mole) = 1.505 x 10^23 atoms
Therefore, there are approximately 1.505 x 10^23 atoms in 0.25 moles of silicon.