What is a mole in chemistry?

chem UNIT 5.4 Review: Mole Concept

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•
Chemistry
•
7th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
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, ions, etc.) as there are in 12 grams of carbon-12.
2.
FLASHCARD QUESTION
Front
How do you calculate the number of moles from grams?
Back
Number of moles = mass (grams) / molar mass (g/mol).
3.
FLASHCARD QUESTION
Front
What is the molar mass of Ti(NO3)4?
Back
The molar mass of Ti(NO3)4 is approximately 292.11 g/mol.
4.
FLASHCARD QUESTION
Front
How many moles are in 675 grams of Ti(NO3)4?
Back
2.28 mol Ti(NO3)4.
5.
FLASHCARD QUESTION
Front
What is the molar mass of BaCO3?
Back
The molar mass of BaCO3 is approximately 197.34 g/mol.
6.
FLASHCARD QUESTION
Front
How many moles are in 540 grams of BaCO3?
Back
2.737 mol BaCO3.
7.
FLASHCARD QUESTION
Front
What is the molar mass of CO2?
Back
The molar mass of CO2 is approximately 44.01 g/mol.
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