The Mole and Molar Mass
Flashcard
•
Chemistry
•
10th - 12th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the definition of a mole in chemistry?
Back
A mole is a unit of measurement in chemistry that represents 6.022 x 10²³ particles (atoms, molecules, ions, etc.) of a substance.
2.
FLASHCARD QUESTION
Front
How do you calculate the molar mass of a compound?
Back
To calculate the molar mass of a compound, sum the atomic masses of all the atoms in its chemical formula, using the periodic table.
3.
FLASHCARD QUESTION
Front
What is the molar mass of C8H18 (octane)?
Back
The molar mass of C8H18 is approximately 114.22 g/mol.
4.
FLASHCARD QUESTION
Front
How do you convert moles to grams?
Back
To convert moles to grams, multiply the number of moles by the molar mass of the substance (grams per mole).
5.
FLASHCARD QUESTION
Front
How do you convert grams to moles?
Back
To convert grams to moles, divide the mass in grams by the molar mass of the substance (grams per mole).
6.
FLASHCARD QUESTION
Front
What is the relationship between moles and molecules?
Back
1 mole of any substance contains 6.022 x 10²³ molecules of that substance.
7.
FLASHCARD QUESTION
Front
What is the mass of 1 mole of oxygen gas (O2)?
Back
The molar mass of O2 is approximately 32 g/mol, so 1 mole of O2 has a mass of 32 grams.
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