Question

How many moles contain 3.1 x 1022 molecules of H2O

Answer 1

The answer is 0.051 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

N = 3.1 × 10²² molecules of H2O

We have

`n = \frac{3.1 * {10}^(22) }{6.02 * {10}^(23) } \\ = 0.05149501...`

We have the final answer as

0.051 moles

Hope this helps you