# If you are given #2.13 x10^24# atoms Au, how do you determine the moles in the sample and the mass of the sample?

Divide the given number by

Next, we multiply this figure by the gold molar mass:

What is the value of your mass?

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To determine moles: ( \text{moles} = \frac{\text{given atoms}}{\text{Avogadro's number}} )

To determine mass: ( \text{mass} = \text{moles} \times \text{molar mass of gold} )

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To determine the number of moles in the sample, divide the given number of atoms by Avogadro's number (6.022 x 10^23). To find the mass of the sample, multiply the number of moles by the molar mass of gold (approximately 197 grams per mole).

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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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