Answer to Question #185011 in Chemistry for aleen

Question

A method is used to prevent rusting in ships and underground pipelines involves connecting the iron to a block of a more active metal such as magnesium. This method is called cathodic protection. How many moles of magnesium are present in 1 billion (1 * 10⁹) atoms of magnesium?

Answer 1

Solution:

Magnesium - Mg

One mole of any substance contains 6.022×10²³ atoms/molecules.

Hence,

Moles of Mg = (1.0×10⁹ atoms of Mg) × (1 mol / 6.022×10²³ atoms) = 1.66 ×10^-15 moles of Mg

Answer: 1.66 ×10^-15 moles of magnesium (Mg) are present in 1 billion atoms of magnesium (Mg).