Mason compared the properties of two compounds. Magnesium oxide is an ionic compound, and hydrogen peroxide is not an ionic compound. Therefore, both compounds most likely have molecular structures.
can be highly reactive.
have low boiling points.
can dissolve in water.

I apologize for the late response but i just did the quiz and it should be C. It dissolves in water

Explanation:

you didnt add any sort of groups or any options, you can edit it and then people can try to answer now its kinda hard.

hope this gives you a heads up why you arent answered. : d

have a great rest of your day!