Question

How many moles are in 20g of potassium (K)?

Answer 1

Step-by-step explanation:

Hi for this one u just need to remember and use the equation.

`moles = (mass)/(mr)`

then u find mr of potassium which is 39.1.

then u do

`(20)/(39.1)`

you get the answer as 0.5115 write ur answer to 3 significant figures which will be 0.512 moles .

hope this helps :)