42. List 2 things a chemical formula indicates about a compound:

-It indicates the elements present in the compound.
-The relative amount of each compound.

Are those correct?

44. What element do most of the polyatomic ions contain?

Thanks
-MC

Yes for 42.

44. oxygen

Yes, your answers for the question about chemical formulas are correct.

For your next question, to determine the element that most polyatomic ions contain, you need to understand what polyatomic ions are.

Polyatomic ions are groups of atoms that carry an overall charge and act as a single unit in chemical reactions. They are made up of multiple atoms bonded together, and can be either positively or negatively charged.

To identify the element most commonly found in polyatomic ions, you can use a periodic table. Look for the common polyatomic ions and examine the elements present in each. By doing this, you will notice that oxygen (O) is the element most commonly found in polyatomic ions. Examples of polyatomic ions that contain oxygen include sulfate (SO4^2-), nitrate (NO3^-), and carbonate (CO3^2-).

Keep in mind that there are other polyatomic ions with different elements, but oxygen is the most prevalent in terms of frequency.