Question

How many moles is ( 1 x 10^9 ) molecules O2

Answer 1

The answer is

`1.66 * {10}^( - 15) \: \: moles`

Step-by-step explanation:

To find the number of moles in a substance given it's number of entities we use the formula

`n = (N)/(L) \\`

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

`n = \frac{1 * {10}^(9) }{6.02 * {10}^(23) } \\`

We have the final answer as

`1.66 * {10}^( - 15) \: \: moles`

Hope this helps you