Answer to Question #69958 in General Chemistry for Kellie

Question

How many particles are in 1.40 x 107 mol of aluminum (Al)?

3.78 x 108 particles Al
2.33 x 10–17 particles Al
8.43 x 1030 particles Al
6.25 x 105 particles Al

Answer 1

Solution:
One mole of any substance contains 6.022*1023 structural units (atoms, molecules, ions, etc.). This number is known as the Avogadro constant.
So 1.04*107 mol of Al contains 1.40*107 * 6.022*1023 = 8.43*1030 structural units (in case of Al – atoms).

Answer:
8.43*1030 particles Al.