I have a chemistry Exam next class so I need help

Answer:
1. Aluminium sulfide
[tex]Al_{2}S_{3}[/tex]
2.Potassium oxide
[tex]K_{2}O[/tex]
3.
[tex]MgCl_{2}[/tex] : Magnesium chloride
4.
HF : Hydrogen fluoride
5.
[tex]H_{2}Se[/tex] : Hydrogen selenide
6.
[tex]CCl_{4}[/tex] : Carbon tetrachloride
7.
[tex]As_{2}O_{3}[/tex] : Diarsenic Trioxide
8. Hydrobromic Acid : HBr
9.Chlorous Acid :
[tex]HClO_{2}[/tex]
10.
[tex](NH_{4})Cr_{2}O_{7}[/tex] : Ammonium dichromate
Explanation: