Percent Composition Review
Flashcard
•
Chemistry
•
10th - 12th Grade
•
Hard
Wayground Content
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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
To calculate percent composition, use the formula: (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 oxygen in MgO?
Back
40%.
4.
FLASHCARD QUESTION
Front
What is the percent composition by mass of magnesium in MgSO4?
Back
20%.
5.
FLASHCARD QUESTION
Front
What is the percent composition by mass of sulfur in MgSO4?
Back
27%.
6.
FLASHCARD QUESTION
Front
What is the formula for calculating the molar mass of a compound?
Back
The molar mass of a compound is calculated by summing the atomic masses of all the atoms in the formula.
7.
FLASHCARD QUESTION
Front
What is the percent composition of oxygen in magnesium chlorate?
Back
50.21%.
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