A salt crystal has a mass of 0.15mg. How many NaCl formula units does it contains?
We need (i) the molar quantity of
Thus, to get the number of units of the sodium chloride formula, we multiply the number of moles by "Avogadro's number":
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In order to find the number of NaCl formula units in the salt crystal, you must first calculate the number of moles of NaCl using its molar mass (58.44 g/mol), and then convert moles to formula units using Avogadro's number (6.022 × 10^23 formula units/mol). First, convert the mass of the salt crystal from milligrams to grams: 0.15 mg = 0.15 × 10^-3 g. Next, calculate the number of moles of NaCl: moles = mass / molar mass moles = 0.15 × 10^-3 g / 58.44 g/mol. Lastly, use Avogadro's number to find the number of formula units: formula units = moles × Avogadro's number
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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.
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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