Balance the following equations. Show your work.

1. __________________ __P + __O2 → __P4O10


2. __________________ __Mg + __O2 → __MgO




3. __________________ __HgO → __Hg + __O2



4. __________________ __Al2O3 → __Al + __O2



5. __________________ __Cl2 + __NaBr → __NaCl + __Br2
Pls help :(