Answer: -270
Step-by-step explanation:
First, simplify the exponent

Then, distribute

Then, subtract(add a negative)

Hope it helps <3 :)
Answer:
no of moles = mass / molar mass
1 mole = 6.02 *10^23 molecules
I don't know if that helped
18 - 25 = -7
11 - 18 = -7
4 - 11 = -7
The common difference is -7.
Answer:

Step-by-step explanation:
