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Examen

AP Chemistry Unit 1-5 Progress Check: MCQ Exam Questions with verified Answers 2026
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22

diciembre 2025

2025/2026

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Which of the following numerical expressions gives the number of moles in 5.0g of CaO? 5.0g ÷ 56 g/mol WHY? Dividing the mass of the sample by the molar mass of CaO gives the number of moles of CaO in the sample. In a lab a student is given a 21g sample of pure Cu metal. Which of the following pieces of information is most useful for determining the number of Cu atoms in the sample? Assume that the pressure and temperature in the lab are 1.0atm and 25°C. The molar mass of Cu WHY?
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