Answer:

Explanation:
Given that,
Charge, Q = 2.1 C
The radius of sphere, r = 1.3 cm = 0.013 m
We need to find the charge per unit volume for this situation. It can be calculated a follows:

So, the charge per unit volume is
.
Answer: k = 2.07692
Explanation: Please find the attached files for the solution
Its just Calcium Flouride because as you can see it is an Ionic bond (Ca is metal and fl is a gas usually)
Energy is not created and not destroyed it will only change form
So heres your answer ; It is given off as other forms of energy/light and heat !!
=answer 2nd one