Hello there!
Sedimentary rocks are formed due to layers so the answer is A.
Best wishes
-HuronGirl
Answer:
<u>Group 2 is the correct answer.</u>
Explanation:
<u>Chlorine has a charge -1. It means that X is +2 so that the formula is XCl2. </u>
The answer I believe is 3.340kj.