Problem: A grain of salt (NaCl) has a mass of about 0.3 mg. How many NaCl molecules are there in one grain of salt?

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The flow of the calculation is

grain of salt (conversion factor) → mass(molar mass) → mol(Avogadro’s number)→ molecules


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A grain of salt (NaCl) has a mass of about 0.3 mg. How many NaCl molecules are there in one grain of salt?

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