Percent Composition by Mass
Flashcard
•
Chemistry
•
10th - 12th Grade
•
Practice Problem
•
Hard
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1.
FLASHCARD QUESTION
Front
What is Percent Composition by Mass?
Back
Percent Composition by Mass 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 Percent Composition by Mass?
Back
Percent Composition by Mass = (mass of element in 1 mole of compound / molar mass of compound) x 100.
3.
FLASHCARD QUESTION
Front
What is the formula for calculating percent by mass?
Back
The formula for calculating percent by mass is: % by mass = (mass of solute / mass of solution) x 100.
4.
FLASHCARD QUESTION
Front
If a compound has a molar mass of 100 g/mol and contains 14.24 g of an element, what is the percent composition of that element?
Back
Percent Composition = (14.24 g / 100 g/mol) x 100 = 14.24%.
5.
FLASHCARD QUESTION
Front
What is the percent composition of a compound with 5.60 g of element A in a total mass of 100 g?
Back
Percent Composition = (5.60 g / 100 g) x 100 = 5.60%.
6.
FLASHCARD QUESTION
Front
If a compound has 88.79 g of element B in a total mass of 100 g, what is the percent composition of element B?
Back
Percent Composition = (88.79 g / 100 g) x 100 = 88.79%.
7.
FLASHCARD QUESTION
Front
What does a higher percent composition indicate about an element in a compound?
Back
A higher percent composition indicates that a greater proportion of the compound's mass is made up of that element.
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