Semester 1 test 2024 -2025 AP chemistry

Flashcard
•
Chemistry
•
10th Grade
•
Hard
Wayground Content
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the molecular structure of CCl4?
Back
CCl4 (carbon tetrachloride) has a tetrahedral molecular geometry with no double bonds.
2.
FLASHCARD QUESTION
Front
What is Avogadro's number?
Back
Avogadro's number is 6.022 x 10^23, which is the number of molecules in one mole of a substance.
3.
FLASHCARD QUESTION
Front
How do you calculate the number of molecules in a sample?
Back
To calculate the number of molecules, you need the molar mass of the compound and the mass of the sample.
4.
FLASHCARD QUESTION
Front
What is the molar mass of zinc (Zn)?
Back
The molar mass of zinc is approximately 65.38 g/mol.
5.
FLASHCARD QUESTION
Front
How do you find the mass of a substance from moles?
Back
Mass (g) = Moles x Molar Mass (g/mol). For example, 6.83 moles of Zn = 6.83 x 65.38 g/mol = 446 g Zn.
6.
FLASHCARD QUESTION
Front
What is a polar molecule?
Back
A polar molecule has a net dipole moment due to the presence of polar bonds, resulting in a molecule with a positive and a negative end.
7.
FLASHCARD QUESTION
Front
Which elements typically have a +1 ionic charge?
Back
Elements like Li, Na, K, and Rb typically have a +1 ionic charge, except for Al which has a +3 charge.
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