# Chapter 3 - Chemical Reactions - Questions for Review and Thought - Topical Questions - Page 148a: 13

$A_2+2B_2−−>2AB_2$

#### Work Step by Step

In a reaction, we are trying to find the correct ratio. To do this, we know that mass cannot be destroyed. We see that we have 2 A's on the right and left, along with 4 A's on the right and left. Thus, the reaction is balanced.

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