Which chemical equation is correctly balanced?

1) Na + O2  Na2O

2) Na + O2  2 Na2O

3) 2 Na + 2 O2  2 Na2O

4) 4 Na + O2  2 Na2O

thanks in advance ;)

Question

Which chemical equation is correctly balanced?

1) Na + O2  Na2O

2) Na + O2  2 Na2O

3) 2 Na + 2 O2  2 Na2O

4) 4 Na + O2  2 Na2O

thanks in advance ;)

anonymous · Answer

Sorry this is in math :(

anonymous · Answer

the answer is number 4 and lol yea u should of asked this in the chem section but that's ok i do chem in school :)

anonymous · Answer

all you do is make sure both sides of the equation have equal amounts of each element, understand?

anonymous · Answer

I kind of understand waht you are saying...

anonymous · Answer

what*

anonymous · Answer

like count the amount of Na & O atoms there r on both sides, For example

anonymous · Answer

For number 1, the left hand side as 1 Na atom and 2 Oxygen atoms while the right side of the equation has 2 Na atoms and 1 O atom. Therefore they rnt balanced cause they rnt equal.

anonymous · Answer

ok so each side has to be balanced in order to answer this question correctly?

anonymous · Answer

for number 4, there r 4 Na atoms and 2 Oxy atoms on both sides of the reaction arrow so the equation is balenced cause both sides have equal amounts of atoms.

anonymous · Answer

correct :)

anonymous · Answer

Ok so would it be...

anonymous · Answer

the first one?

anonymous · Answer

no, cause one side has 2 sodium atoms where as the other has only 1. Therfore they rnt balanced

e.cociuba · Answer

D. 4 Na and 2 O at both sides.

anonymous · Answer

But none of them have o2 all of them are 2o

anonymous · Answer

i agree with u @e.cociuba :)

anonymous · Answer

but that is 4Na vs. 2Na

e.cociuba · Answer

Equation 4. The atoms on both sides are equal. :)

anonymous · Answer

ill explain now

e.cociuba · Answer

Haha finally someone does...

anonymous · Answer

Ok thanks

anonymous · Answer

$$4 Na + O _{2} ---> 2 Na _{2}O$$

anonymous · Answer

So d: 4 Na + O2 -> 2 Na2O

anonymous · Answer

Oh ok thanks ;)

e.cociuba · Answer

"Ya Buddy"... U got it.. But do u understand y??

anonymous · Answer

Could you agree or disagree with some of my other answers? Just two more.

e.cociuba · Answer

Shoot em! :P

anonymous · Answer

Not so much but at least I can figure it out a little

anonymous · Answer

I just don't quite understand why 4Na changes to 2Na

e.cociuba · Answer

Ok we will help u understand w/ the other's...

anonymous · Answer

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wat you do is multiply the big 2 by the subscript numbers by Na and O