I need some help with balancing chemical equations...can i get some?

Question

anonymous · Answer

i reallly need help

aaronq · Answer

What exactly is giving you trouble in these questions?

anonymous · Answer

Where is your equation?

anonymous · Answer

sorry i got distracted... so one equation is Na+O2+Na2O

aaronq · Answer

so the point of these questions is to get the number of atoms equal on both sides by writing coefficients infront of the species. 

Coefficients work as multiplicative operators, $3~CO$ means that there are 3 C's and 3 O's.

For example, $AB\rightarrow A_2+B_2$

Right side:  1 A, 1 B

Left side: 2 A, 2 B

Add a two infront of AB:  $\color{red}2AB\rightarrow A_2+B_2$

Right side:  2 A, 2 B

Left side: 2 A, 2 B

balanced.

aaronq · Answer

I wrote right side and left side backwards, please note that error.

So for your question: $Na+O_2+\rightarrow  Na_2O$

Left side: 1 Na, 2 O

Right side: 2 Na, 1 O

anonymous · Answer

thank you soo much anyway!!