# What is the formula weight?

This is simply a calculation of the mass of one mole of a given substance.

Is it true that I knew the atomic masses from memory? (It is true that I did, and you will quickly learn the common ones.) This is an operation that you will perform frequently and quickly.

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The formula weight is the sum of the atomic weights of all the atoms in a chemical formula.

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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