How Do You Balance Chemical Equations?

[Hellohi]

Um it says not to post homework but alotta ppl did so I am assuming it means only chemistry.
I'm sorry if I am wrong and I've used this site a little but I forgot how to post (ima noob:( ).

O.k so, I am kinda noob to chem to. We got a test tommorow on Balancing Chemical equations and I need help (I would be grateful!). I can balance the number and letter ones example: 2al+H2SO4 --> Ak2(SO4)3 + H2

I can do those ones but I can't do these ones (no matter how easy they are:( )

Mercury + oxygen --> Mercuric oxide

Ferric oxide + hydrogen --> iron + water

Please I'd be very grateful if I got a quick detailed response.

Btw I am not in university yet so please make it just a bit simple, thank you very much:D

 

[Borek]

There is a separate section of the forums devoted to homework questions.

Your problem has nothing to do with balancing chemical reactions - you need to learn how to convert between names and formulas. I am more than sure you have covered naming of chemical compounds, you need to refresh this part of material.

Ferric oxide + hydrogen --> iron + water

What are formulas of all four substances mentioned?