How many moles of Ca are in 7.2x10^25 molecules of Ca
(show work)

Explanation:

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

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

We have the final answer as

Hope this helps you

precipitation

explanation:

when it goes from cloud to rain/back to earth in the form of rain

space exploration has led to the development and technological improvement of many everyday items. (if this answer is wrong i will find the right answer) : )