Hello. I'm new at here...
A question need help. I just move to Australia. N i had picked the subject of chemistry. Is quite hard for me.
Em.... my question is, can u guys teach me tat how to done the chemical equation correctly? Know wat i means?
For example, Aluminium + oxygen = aluminium oxide. Y the equation of it become 4Al + 3O2 = 2AL2O3.
Y will get 4 for aluminium?
My english not very good,.... Can someone use some simply english explain to me ???