8C - Percent Composition Practice
Flashcard
•
Chemistry
•
10th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is percent composition in chemistry?
Back
Percent composition is the percentage by mass of each element in a compound, calculated by dividing the mass of each 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
To calculate the percent composition of an element, use the formula: (mass of the element in 1 mole of the compound / molar mass of the compound) x 100.
3.
FLASHCARD QUESTION
Front
What is the percent by mass of fluorine in CaF2?
Back
49%.
4.
FLASHCARD QUESTION
Front
What is the percent composition of copper (Cu) in Cu2S?
Back
%Cu = 79.854%.
5.
FLASHCARD QUESTION
Front
What is the percent composition of sulfur (S) in Cu2S?
Back
%S = 20.145%.
6.
FLASHCARD QUESTION
Front
What is the percent composition by mass of sulfur in MgSO4?
Back
27%.
7.
FLASHCARD QUESTION
Front
What is the percent composition by mass of oxygen in MgSO4?
Back
53%.
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