What is a mole in chemistry?
Moles, Molar Mass, and Conversions

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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
What is molar mass?
Back
Molar mass is the mass of one mole of a substance, typically expressed in grams per mole (g/mol). It is calculated by summing the atomic masses of all atoms in a molecule.
3.
FLASHCARD QUESTION
Front
How many atoms are in 1 mole of any substance?
Back
1 mole of any substance contains approximately 6.022 x 10^23 atoms, known as Avogadro's number.
4.
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.
5.
FLASHCARD QUESTION
Front
How do you calculate the molar mass of a compound?
Back
To calculate the molar mass, add the atomic masses of all the atoms in the compound's formula.
6.
FLASHCARD QUESTION
Front
What is the molar mass of water (H2O)?
Back
The molar mass of water is approximately 18 g/mol (2*1 g/mol for H + 16 g/mol for O).
7.
FLASHCARD QUESTION
Front
What is the relationship between moles and grams?
Back
The relationship is given by the formula: grams = moles x molar mass.
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