Unit 6 Flashcard 1 - Moles
Flashcard
•
Chemistry
•
9th - 12th Grade
•
Practice Problem
•
Hard
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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 particles are in one mole?
Back
6.02 x 10^23 particles, known as Avogadro's number.
3.
FLASHCARD QUESTION
Front
What is the formula to calculate the number of moles?
Back
Number of moles = mass (g) / molar mass (g/mol).
4.
FLASHCARD QUESTION
Front
How do you calculate the molar mass of a compound?
Back
Add the atomic masses of all the atoms in the compound's formula.
5.
FLASHCARD QUESTION
Front
What is the molar mass of NaF?
Back
The molar mass of NaF (Sodium Fluoride) is approximately 41.99 g/mol.
6.
FLASHCARD QUESTION
Front
How many moles are in 2.1 g of NaF?
Back
0.050 mol.
7.
FLASHCARD QUESTION
Front
What is the molar mass of FeCl3?
Back
The molar mass of FeCl3 (Iron(III) Chloride) is approximately 162.19 g/mol.
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