In order for us to help we need more information. Possibly the amount of grams you used for Mg in trial 1 or something similar to this.
Answer:
K is the symbol for potassium
The Organisms that formed them likely lived during the Paleozoic era.
Answer:
The answer for 10 times 20 is 200
Explanation:
Why... Because what is 1 times 2=2 so add the left over zero I'm that your answer!