What is Avogadro's Number?
Mole Concept

Flashcard
•
Chemistry
•
10th Grade
•
Medium
Sherard Kenrico Shannon Lightbourne
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15 questions
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1.
FLASHCARD QUESTION
Front
Back
Avogadro's Number is 6.02 x 10^23, which represents the number of particles (atoms, molecules, etc.) in one mole of a substance.
2.
FLASHCARD QUESTION
Front
How do you calculate the mass of a substance from moles?
Back
To calculate the mass of a substance from moles, use the formula: Mass (g) = Moles x Molar Mass (g/mol).
3.
FLASHCARD QUESTION
Front
What is the molar mass of sodium chloride (NaCl)?
Back
The molar mass of sodium chloride (NaCl) is approximately 58.44 g/mol.
4.
FLASHCARD QUESTION
Front
If I have 20.4 moles of sodium chloride, how much does it weigh?
Back
To find the weight, multiply the moles by the molar mass: 20.4 moles x 58.44 g/mol = 1192 g.
5.
FLASHCARD QUESTION
Front
What is the molar mass of magnesium (Mg)?
Back
The molar mass of magnesium (Mg) is approximately 24.31 g/mol.
6.
FLASHCARD QUESTION
Front
How do you find the mass of a substance given the number of moles?
Back
Multiply the number of moles by the molar mass of the substance.
7.
FLASHCARD QUESTION
Front
What is the mass of 0.75 moles of magnesium (Mg)?
Back
0.75 moles x 24.31 g/mol = 18 grams.
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