QQuestionChemistry
QuestionChemistry
The molar mass of silicon (Si) is 28.09 g/mol. Calculate the number of atoms in a 92.8 mg sample of Si.
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Answer
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Step 1: Convert the mass of silicon from milligrams to grams.
We know that: 1000 mg = 1 g So,
Step 28 mg = \frac{92.8}{1000} g = 0.0928 g
Final Answer
The number of atoms in a 92.8 mg sample of Si is approximately 2.0 x 10^21 atoms.
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