What is the correct equation for calculating the average atomic mass for 3 isotopes? (pls be 100%of your answer pls no guessing)
add all the masses together and divide by 3
add all the protons together and divide by three
multiply the percent abundance by each mass, add them up, and then divide by 3 multiply the percent abudance by each mass and add them up

The correct equation for measuring the average microscopic weight  for 3 isotopes is multiply the rate of abundance by each weight and add them.

Explanation:

To calculate the average microscopic mass of element using weights and relative abundance we have to follow the following steps.

This gives the required  average microscopic weight of the three isotopes.

i don't know, you need to give me some answers.

explanation:

spare some change and give it to the poor

explanation:

plz : ((