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A student needs to conduct a reaction that combines chemicals A and B to synthesize product AB. If we write this as a chemical equation it looks like: A+B→AB If this student combines 100 molecules of A and 100 molecules of B, the student obtains 100 molecules of AB. How many molecules of A would this student need to make 5000 molecules of AB? (Assume the student had enough of molecule B to make 5000 molecules of AB.)

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Answer:

100 molecules of A would this student need to make 5000 molecules of AB.

Explanation:

A + B → AB

100 A molecules reacts with 100 B molecules to give 100 AB molecules.

This can also be written as , 100 molecules of AB are obtained from 100 molecules of A.

Then 5000 molecules of AB are obtained from:

[tex]\frac{100}{100}\times 5000=5000[/tex] molecules of A

So, in order to obtain 100 molecules of AB 100 molecules of A are needed.

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