iron Presence of trace elements, irradiation and iron impurities give the gem amethyst its purplish color!
Answer:
C. BF3
Explanation:
The boron in BF3 is electron poor and has an empty orbital, so it can accept a pair of electrons, making it a Lewis acid.
I am pretty sure that the answer is B. extrusive rock. I hope that this helps you!! Good Luck!!
C can be the only correct answer - 6.023 x 10^23 is the amount of molecules in a mol of an element. 4.5 x 6.023 x 10^23 can not equal anything but C.
4.5 x 6.023 x 10^23 = 2.71035 x 10^24
