
AP Chem Semester 1 Exam Practice
Flashcard
•
Chemistry
•
10th - 12th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the ground state electron configuration of Cobalt?
Back
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁷
2.
FLASHCARD QUESTION
Front
Which element has the most negative electron affinity among Cl, P, Mg, Na, and K?
Back
Cl (Chlorine) has the most negative electron affinity.
3.
FLASHCARD QUESTION
Front
What does the law of constant composition state?
Back
The law of constant composition states that a chemical compound always contains its component elements in fixed ratio by mass.
4.
FLASHCARD QUESTION
Front
How do you calculate the mass of NaN₃ required to provide a specific volume of N₂ at given conditions?
Back
Use the ideal gas law (PV=nRT) to find moles of N₂, then convert moles to grams using the molar mass of NaN₃.
5.
FLASHCARD QUESTION
Front
What is the reaction of Calcium carbide (CaC₂) with water?
Back
CaC₂ (s) + 2H₂O (g) → Ca(OH)₂ (s) + C₂H₂ (g) produces acetylene.
6.
FLASHCARD QUESTION
Front
What is the molar mass of NaN₃?
Back
The molar mass of NaN₃ (Sodium azide) is approximately 65.01 g/mol.
7.
FLASHCARD QUESTION
Front
What is electron affinity?
Back
Electron affinity is the amount of energy released when an electron is added to a neutral atom to form a negative ion.
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