Write the formula for the following covalent compounds

1.) Carbon Dioxide.

2.) Sulfur Trioxide.

3.) Dinitrogen trioxide.

4.) Dinitrogen pentoxide.

5.) Phosphorus trichloride.

6.) Ammonia.

7.) Sulfur Hexachloride.

8.) Phosphorus Pentoxide.

9.) Carbon Tetrachloride.

10.) Silicon Dioxide.

11.) Carbon Disulfide.

12.) Phosphorus tribromide.

13.) I don't have notes on this one so I don't know.

14.) Aluminum Oxide.

15.) Dichloride Heptoxide. (Not 100% sure if that was a 2 or a 7 at the end.)

Hope this helps and sorry it took so long I had to search through my chemistry notes from awhile ago. But I tried as best I could. :)

oxygen, selenium, tellurium, and polonium.

they're all from the same group as sulfur (group 16).

the answer is d. 74.02