What is a mole in chemistry?
The Math of Chemistry (A to Z)

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Chemistry
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9th - 12th Grade
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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, etc.) as there are in 12 grams of carbon-12.
2.
FLASHCARD QUESTION
Front
How do you calculate the number of moles from volume and molarity?
Back
Number of moles = Volume (L) × Molarity (mol/L).
3.
FLASHCARD QUESTION
Front
What is the empirical formula?
Back
The empirical formula is the simplest whole-number ratio of atoms of each element in a compound.
4.
FLASHCARD QUESTION
Front
How do you determine the empirical formula from percent composition?
Back
Convert the percentage of each element to grams, then to moles, and divide by the smallest number of moles to find the simplest ratio.
5.
FLASHCARD QUESTION
Front
What is specific heat capacity?
Back
Specific heat capacity is the amount of heat required to raise the temperature of 1 gram of a substance by 1 degree Celsius.
6.
FLASHCARD QUESTION
Front
How do you calculate heat energy using specific heat?
Back
Heat energy (Q) = mass (g) × specific heat (J/g°C) × change in temperature (°C).
7.
FLASHCARD QUESTION
Front
What is the relationship between moles and mass?
Back
Moles = Mass (g) / Molar mass (g/mol).
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