What is a mole in chemistry?
Two-Step Moles

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Science
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10th - 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 amounts of a chemical substance, defined as exactly 6.022 x 10^23 particles (atoms, molecules, ions, etc.).
2.
FLASHCARD QUESTION
Front
How do you convert molecules to moles?
Back
To convert molecules to moles, divide the number of molecules by Avogadro's number (6.022 x 10^23).
3.
FLASHCARD QUESTION
Front
What is the molar mass of CO2?
Back
The molar mass of CO2 is approximately 44.01 g/mol.
4.
FLASHCARD QUESTION
Front
How do you calculate the mass of a substance from moles?
Back
To calculate mass from moles, multiply the number of moles by the molar mass of the substance.
5.
FLASHCARD QUESTION
Front
What is the formula to find the number of particles in a given mass?
Back
Number of particles = (mass in grams / molar mass) x Avogadro's number.
6.
FLASHCARD QUESTION
Front
What is STP in chemistry?
Back
STP stands for Standard Temperature and Pressure, which is defined as 0 degrees Celsius (273.15 K) and 1 atmosphere (atm) pressure.
7.
FLASHCARD QUESTION
Front
How do you convert grams to moles?
Back
To convert grams to moles, divide the mass of the substance by its molar mass.
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