Mole Calculations
Flashcard
•
Chemistry
•
9th - 12th Grade
•
Practice Problem
•
Hard
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1.
FLASHCARD QUESTION
Front
What is a mole in chemistry?
Back
A mole is a unit of measurement used to express the amount of a substance. It is defined as the amount of substance that contains as many entities (atoms, molecules, etc.) as there are in 12 grams of carbon-12.
2.
FLASHCARD QUESTION
Front
What is Avogadro's number?
Back
Avogadro's number is 6.02 x 10^23, which is the number of particles (atoms, molecules, etc.) in one mole of a substance.
3.
FLASHCARD QUESTION
Front
How do you calculate the number of moles from mass?
Back
Number of moles = mass (g) / molar mass (g/mol).
4.
FLASHCARD QUESTION
Front
What is molar mass?
Back
Molar mass is the mass of one mole of a substance, typically expressed in grams per mole (g/mol).
5.
FLASHCARD QUESTION
Front
How many grams are in one mole of water (H2O)?
Back
One mole of water (H2O) has a mass of approximately 18.02 grams.
6.
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.
7.
FLASHCARD QUESTION
Front
How many moles are in 22 grams of NaCl?
Back
Number of moles = 22 g / 58.44 g/mol ≈ 0.38 moles.
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