Question

The mass of a single molybdenum atom is 1.59×10⁻²² g. Suppose enough Mo atoms were lined up like beads on a string to span a distance of 33.4 cm (13 inches). How many atoms would be required?

Answer 1

7.99 × 10⁸ atoms

Step-by-step explanation:

The diameter of Molybdenum atom is 418pm = 0.000000000418m

therefore to determine number of Mo Atoms that'll be required =

0.334 ÷ 0.000000000418 = 7.99 × 10⁸ atoms

Mass of one Mo atom = 1.59×10⁻²² g

Mass of 7.99 × 10⁸ atoms that'll be required = 1.59×10⁻²² × 7.99 × 10⁸ =

12.7041 × 10⁻¹³g.