Answer:
A. At the top of the rock stack.
Explanation:
2.8 * 10 ^ 24 / 6.022 * 10 ^ 23 = 4.650 moles.
<span>The correct formula for Beryllium phosphate is Be3(PO4)2
Beryllium has a charge of +2 and phosphate has a charge of -3. So to make the charge equal to zero, 3x +2 = 6, and 2 x-3 = -6
-6 + +6 = 0</span>
The symbol of magnesium is mg and iron is Ir