Percent Composition Flashcard
Flashcard
•
Chemistry
•
10th Grade
•
Practice Problem
•
Hard
Wayground Content
FREE Resource
Student preview
15 questions
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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 the percent composition of an element in a compound?
Back
To calculate the percent composition of an element in a compound, 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 molar mass of MgSO4?
Back
The molar mass of MgSO4 (Magnesium Sulfate) is 120 g/mol.
4.
FLASHCARD QUESTION
Front
What is the percent composition by mass of sulfur in MgSO4?
Back
The percent composition by mass of sulfur in MgSO4 is 27%.
5.
FLASHCARD QUESTION
Front
What is the total atomic mass of carbon monoxide (CO)?
Back
The total atomic mass of carbon monoxide (CO) is approximately 28 g/mol (12 g/mol for carbon and 16 g/mol for oxygen).
6.
FLASHCARD QUESTION
Front
What percentage of the total atomic mass of CO is composed of carbon?
Back
Carbon makes up approximately 42.9% of the total atomic mass of CO.
7.
FLASHCARD QUESTION
Front
Which element has a greater mass in carbon monoxide, carbon or oxygen?
Back
Oxygen has a greater mass in carbon monoxide (CO).
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