What is the definition of a mole in chemistry?
Mole, Molar Mass, Ionic Compounds

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Chemistry
•
10th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
A mole is a unit of measurement in chemistry that represents 6.02 x 10^23 particles, atoms, or molecules.
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 the molecular formula.
3.
FLASHCARD QUESTION
Front
What is the molar mass of water (H2O)?
Back
The molar mass of water (H2O) is approximately 18 grams/mole.
4.
FLASHCARD QUESTION
Front
If you have 2 moles of a substance, how many particles do you have?
Back
You have 2 x 6.02 x 10^23 particles, which equals approximately 1.204 x 10^24 particles.
5.
FLASHCARD QUESTION
Front
What is the relationship between moles and mass?
Back
The mass of a substance in grams is equal to the number of moles multiplied by the molar mass (mass = moles x molar mass).
6.
FLASHCARD QUESTION
Front
What is the molar mass of sodium chloride (NaCl)?
Back
The molar mass of sodium chloride (NaCl) is approximately 58.5 grams/mole.
7.
FLASHCARD QUESTION
Front
How many moles are in 150 grams of Na2O?
Back
To find the number of moles, divide the mass by the molar mass of Na2O (62 grams/mole). 150 grams / 62 grams/mole = approximately 2.42 moles.
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