What is the mass (in grams) of one molecule of phosphorus pentachloride?

Name: What is the mass (in grams) of one molecule of phosphorus pentachloride?
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Quizplus · Accepted Answer

To find the mass of one molecule of phosphorus pentachloride (PCl5), first calculate its molar mass: Phosphorus (P) = 30.97 g/mol, Chlorine (Cl) = 35.45 g/mol. PCl5 = 30.97 + (5 × 35.45) = 208.22 g/mol. Then, divide by Avogadro's number (6.022 × 10^23 mol^-1) to find the mass of one molecule: 208.22 g/mol / 6.022 × 10^23 mol^-1 = 3.46 × 10^-22 g.

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