Percent Composition Flashcard
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?
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 element in 1 mole of compound / molar mass of compound) x 100.
3.
FLASHCARD QUESTION
Front
What is the percent composition of magnesium in magnesium bromide (MgBr2)?
Back
To find the percent composition of magnesium in MgBr2, calculate: (mass of Mg / total mass of MgBr2) x 100.
4.
FLASHCARD QUESTION
Front
What is the molar mass of magnesium bromide (MgBr2)?
Back
The molar mass of MgBr2 is approximately 184.11 g/mol (24.31 g/mol for Mg and 79.90 g/mol for each Br, with 2 Br atoms).
5.
FLASHCARD QUESTION
Front
Which element has a higher percent composition in magnesium bromide, magnesium or bromine?
Back
Bromine has a higher percent composition in magnesium bromide (MgBr2) because it contributes more to the total mass.
6.
FLASHCARD QUESTION
Front
What is the percent composition of oxygen in aluminum phosphate (AlPO4)?
Back
The percent composition of oxygen in AlPO4 is approximately 42.1%.
7.
FLASHCARD QUESTION
Front
In carbon monoxide (CO), which element has a higher percent composition?
Back
Oxygen has a higher percent composition in carbon monoxide (CO) than carbon.
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