What is a mole in chemistry?
Moles to grams and grams to moles

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•
Chemistry
•
10th 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, etc.) as there are in 12 grams of carbon-12.
2.
FLASHCARD QUESTION
Front
How do you convert grams to moles?
Back
To convert grams to moles, use the formula: Moles = Mass (g) / Molar Mass (g/mol).
3.
FLASHCARD QUESTION
Front
How do you convert moles to grams?
Back
To convert moles to grams, use the formula: Mass (g) = Moles x Molar Mass (g/mol).
4.
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.
5.
FLASHCARD QUESTION
Front
What is the molar mass of zinc sulfide (ZnS)?
Back
The molar mass of zinc sulfide (ZnS) is approximately 97.44 g/mol (Zinc: 65.38 g/mol + Sulfur: 32.06 g/mol).
6.
FLASHCARD QUESTION
Front
What is the percent composition of an element in a compound?
Back
Percent composition is the percentage by mass of each element in a compound, calculated using the formula: (mass of element in 1 mole of compound / molar mass of compound) x 100%.
7.
FLASHCARD QUESTION
Front
How do you calculate the percent composition of zinc in ZnS?
Back
Percent composition of zinc in ZnS = (mass of zinc / molar mass of ZnS) x 100% = (65.38 g / 97.44 g) x 100% = 67.1%.
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