
Moles Review
Flashcard
•
Chemistry
•
10th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a mole in chemistry?
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 many atoms are in one mole of a substance?
Back
One mole of any substance contains approximately 6.022 x 10^23 entities, known as Avogadro's number.
3.
FLASHCARD QUESTION
Front
What is the molar mass of an element?
Back
The molar mass is the mass of one mole of a substance, typically expressed in grams per mole (g/mol). It is numerically equivalent to the atomic or molecular weight of the substance.
4.
FLASHCARD QUESTION
Front
How do you convert grams to moles?
Back
To convert grams to moles, divide the mass of the substance (in grams) by its molar mass (in g/mol). Formula: Moles = Mass (g) / Molar Mass (g/mol).
5.
FLASHCARD QUESTION
Front
What is the formula to calculate the number of atoms from moles?
Back
Number of atoms = Moles x Avogadro's number (6.022 x 10^23).
6.
FLASHCARD QUESTION
Front
What is the scientific notation for 1000?
Back
1 x 10^3.
7.
FLASHCARD QUESTION
Front
How do you calculate the molar mass of a compound?
Back
To calculate the molar mass of a compound, sum the molar masses of all the atoms in its chemical formula.
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