What is Avogadro's number?
Unit 3 Review

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Chemistry
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9th - 12th Grade
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Hard
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1.
FLASHCARD QUESTION
Front
Back
Avogadro's number is 6.022 x 10^23, which is the number of representative particles (atoms, molecules, etc.) in one mole of a substance.
2.
FLASHCARD QUESTION
Front
What is the mass of 0.02 moles of potassium atoms?
Back
0.02 moles of potassium atoms has a mass of 0.782 g.
3.
FLASHCARD QUESTION
Front
How many molecules are in 1 mole of a substance?
Back
1 mole of a substance contains 6.022 x 10^23 molecules.
4.
FLASHCARD QUESTION
Front
What is the relationship between moles and mass?
Back
The mass of a substance in grams can be calculated by multiplying the number of moles by the molar mass of the substance.
5.
FLASHCARD QUESTION
Front
What is a balanced chemical equation?
Back
A balanced chemical equation has the same number of each type of atom on both sides of the equation, indicating that mass is conserved.
6.
FLASHCARD QUESTION
Front
How do you calculate the number of molecules from moles?
Back
To calculate the number of molecules from moles, multiply the number of moles by Avogadro's number (6.022 x 10^23).
7.
FLASHCARD QUESTION
Front
What is the molar mass of AlCl3?
Back
The molar mass of AlCl3 (Aluminum Chloride) is approximately 133.33 g/mol.
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