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Balance refers to a state of equilibrium in science.

To balance a science equation, you need to fill in the missing numbers to make both sides equal. For example, if you have a question like:

KOH+ MgCl2 ---> KCl+ Mg(OH)2

You look on both sides of the equation first. I directly look at the K and try to find the K on the other side. It shows that both sides only have 1 K, so that's equal. Then I look at the O, and see that there is 2 O's on the right side. So, I place a 2 in front of the KOH...

2KOH+ MgCl2 ----> KCl+ Mg(OH)2

The that makes the K on the left side more than the left. So I place a 2 infron of the KCl

2KOH+ MgCl2 -----> 2KCl+ Mg(OH)2

The I look from letter to letter on each side and see if anything else is not balanced. Now the equation is balanced so the question is answered.

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