Question

Given 5.0 x 1024 K2SO4 formula units, how many moles are present?

Answer 1

`\huge{ \bold{ \text{8.31 moles}}}`

Step-by-step explanation:

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

`\bold{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 = 5.0 × 10²⁴
`K_2SO_4 \: \text{formula units}`

`\: n = \frac{5 * {10}^(24) }{6.02 * {10}^(23) } \\ = 8.3056`

We have the final answer as

8.31 moles