Question 1
A 36.0 g sample of pure water (molar mass 18.0 g/mol) is completely vaporized. How many moles of water molecules are present in the sample?
Correct Answer:
2.0 mol
Question 2
In a mass spectrum, an element shows two peaks: mass 10 (relative abundance 20%) and mass 11 (relative abundance 80%). What is the approximate average atomic mass of this element?
Correct Answer:
10.8
Question 3
Which ground-state electron configuration correctly represents a neutral chlorine atom (Z = 17)?
Correct Answer:
1s2 2s2 2p6 3s2 3p5
Question 4
A photoelectron spectrum (PES) of a neutral element shows three peaks corresponding to the 1s, 2s, and 2p subshells, with relative peak heights of 2 : 2 : 6. Which element does this spectrum represent?
Correct Answer:
Neon
Question 5
As you move from left to right across a period in the periodic table, what generally happens to atomic radius and why?
Correct Answer:
It decreases because the increasing nuclear charge pulls electrons closer
Question 1
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Prepare with the AP Chemistry Practice Questions - AP Chemistry (Advanced Placement Chemistry) Exam practice quiz. This question bank includes 100 questions covering reaction, solution, mass, rate, and temperature. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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AP Chemistry Practice Questions - AP Chemistry (Advanced Placement Chemistry) Exam

This practice set contains 100 questions from the matching question bank and focuses on reaction, solution, mass, rate, and temperature. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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