Question

A molecule of pentane is made of 5 carbon atoms and 12 hydrogen atoms. A collection of pentane molecules has 3.01 x 10^24 carbon atoms. How many hydrogen atoms are in the collection?

Answer 1

`(5)/(12) = \frac{x}{3.01 * {10}^(24) } \\ \frac{5(3.01 * {10}^(24) )}{12} = x \\ x = 1.25 * {10}^(24) atoms`