Percent Composition Flashcard

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.

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.

Front

What is the molar mass of MgSO4?

Back

The molar mass of MgSO4 (Magnesium Sulfate) is 120 g/mol.

Front

What is the percent composition by mass of sulfur in MgSO4?

Back

The percent composition by mass of sulfur in MgSO4 is 27%.

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).

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.

Front

Which element has a greater mass in carbon monoxide, carbon or oxygen?

Back

Oxygen has a greater mass in carbon monoxide (CO).

Front

What is the percent by mass of manganese (Mn) in KMnO4?

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The percent by mass of manganese (Mn) in KMnO4 is 35%.

Front

What is the molar mass of KMnO4?

Back

The molar mass of KMnO4 (Potassium Permanganate) is approximately 158 g/mol.

Front

What is the percent composition by mass of oxygen in CO?

Back

The percent composition by mass of oxygen in CO is 57%.