Why do chemical reactions need to be balanced?

Answer 1

Because of the law of conservation of mass.

Answer 2

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RE:
Why do chemical reactions need to be balanced?

Answer 3

Because when you put a certain amount in, the same amount needs to come out whether or not it comes out the same way.
For exampe..
You put in A, B, C, and D in a box all seperately with magnets on the back of them. There are four magnets that are seperated in the box.
You close the lid and shake the box.
You open it to see only 2 magnets.. A and C are together and B and D are together. However, there are still a total of 4 magnets.
That's like..the easiest way I could describe it. You wouldn't expect to only have 3 magnets because what you put in is what you expect to get when you open it again (even though they may have changed around a bit).
Makes sense?
Lets hope so!

Answer 4

Oh gee my friend lets just see what happens if the chemical reactions will straighten their selves out. Of course How would you like to be off balance? Have you ever done this.. It is not a good thing You feel in human and like you may die soon.

Answer 5

Because mass cannot be created or destroyed, so the same amount must exist before and after every chemical reaction.

Answer 6

They need to balance because yo can't create or loss matter For an example H+O=H2O. In this equation you created a hydrogen atom. So the right equation would be 2H+0=H2O

Answer 7

well its like this: if you put toast in a working taster and set it so that it will pop out, the what goes in must come out. Its the law. heres a cool activity to do to help you remember.

Answer 8

If not, you are representing different amounts of matter on each side, and like the law of conservation of matter, you cannot create matter or destory it

Answer 9

The law states that you can not create or destroy any element.So everything has to be accounted for.

Answer 10

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2 H2 + O2 -------------- 2 H2O