You have 25.0 g of a compound that contains only silicon and nitrogen. Chemical analysis reveals that your sample contains 15.0 g of silicon. What is the empirical formula for your compound?

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Quizplus · Accepted Answer

To find the empirical formula, calculate the moles of each element. Silicon: 15.0 g / 28.09 g/mol = 0.534 mol. Nitrogen: (25.0 g - 15.0 g) / 14.01 g/mol = 0.714 mol. The mole ratio is approximately 3:4, giving the empirical formula Si₃N₄.

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