Percent Composition
Flashcard
•
Chemistry
•
10th - 11th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is percent composition?
Back
Percent composition is the percentage by mass of each element in a compound, calculated by dividing the mass of the element by the total mass of the compound and multiplying by 100.
2.
FLASHCARD QUESTION
Front
How do you calculate the percent composition of an element in a compound?
Back
Percent composition = (mass of element in 1 mole of compound / molar mass of compound) x 100.
3.
FLASHCARD QUESTION
Front
What is the percent by mass of Na in NaOH?
Back
57.5%
4.
FLASHCARD QUESTION
Front
What is the percent by mass of fluorine in CaF2?
Back
49%
5.
FLASHCARD QUESTION
Front
What is the mass % of aluminum in aluminum sulfate Al2(SO4)3?
Back
15.77%
6.
FLASHCARD QUESTION
Front
What is the percent composition by mass of sulfur in MgSO4?
Back
27%
7.
FLASHCARD QUESTION
Front
What is the molar mass of NaOH?
Back
The molar mass of NaOH is approximately 40 g/mol.
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