Molar Mass

Flashcard
•
Chemistry
•
12th Grade
•
Hard
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1.
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.
2.
FLASHCARD QUESTION
Front
How do you calculate the molar mass of a compound?
Back
To calculate the molar mass, identify the number of each type of atom in the compound, multiply by the atomic mass of each element, and sum the total.
3.
FLASHCARD QUESTION
Front
What is the molar mass of water (H₂O)?
Back
The molar mass of water is 18.02 g/mol (2 hydrogen atoms at 1.01 g/mol each and 1 oxygen atom at 16.00 g/mol).
4.
FLASHCARD QUESTION
Front
Calculate the molar mass of NaCl.
Back
The molar mass of NaCl is 58.44 g/mol (sodium: 22.99 g/mol + chlorine: 35.45 g/mol).
5.
FLASHCARD QUESTION
Front
What is the significance of molar mass in stoichiometry?
Back
Molar mass is used to convert between grams and moles in chemical reactions, allowing for the calculation of reactants and products.
6.
FLASHCARD QUESTION
Front
How many moles are in 100 grams of NaCl?
Back
To find moles, divide the mass by the molar mass: 100 g / 58.44 g/mol = 1.71 moles.
7.
FLASHCARD QUESTION
Front
What is the molar mass of sulfuric acid (H₂SO₄)?
Back
The molar mass of sulfuric acid is 98.08 g/mol (2 hydrogen: 2.02 g/mol, 1 sulfur: 32.07 g/mol, 4 oxygen: 64.00 g/mol).
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