
Molar Mass and Percent Composition
Flashcard
•
Chemistry
•
10th Grade
•
Practice Problem
•
Hard
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1.
FLASHCARD QUESTION
Front
What is the definition of Molar Mass?
Back
Molar Mass is the mass of one mole of a substance, typically expressed in grams per mole (g/mol).
2.
FLASHCARD QUESTION
Front
What is Avogadro's number?
Back
Avogadro's number is 6.02 x 10^23, which is the number of representative particles (atoms, molecules, etc.) in one mole of a substance.
3.
FLASHCARD QUESTION
Front
How do you calculate the number of moles from volume and molarity?
Back
Number of moles = Molarity (M) x Volume (L).
4.
FLASHCARD QUESTION
Front
What is the formula for percent composition by mass?
Back
Percent Composition = (Mass of element in 1 mole of compound / Molar Mass of compound) x 100%.
5.
FLASHCARD QUESTION
Front
How many particles are in 1 mole of any substance?
Back
1 mole of any substance contains 6.02 x 10^23 particles.
6.
FLASHCARD QUESTION
Front
What is the percent by mass of an element in a compound?
Back
It is the mass of the element divided by the total mass of the compound, multiplied by 100.
7.
FLASHCARD QUESTION
Front
If you have 2 moles of a substance, how many grams do you have if the molar mass is 18 g/mol?
Back
You have 36 grams (2 moles x 18 g/mol).
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