Percent Composition and Molar Mass Flashcard

Front

What is the general equation for calculating percent composition?

Back

Front

What is the molar mass of fluorine gas, F₂?

Back

38 g/mol

Front

What is the percent composition of chlorine in calcium chloride (CaCl₂)?

Back

48.24%

Front

What is the percentage of oxygen in carbon dioxide (CO₂)?

Back

72.7%

Front

Find the percent composition of Cu₂S.

Back

%Cu= 79.854 %S= 20.145

Front

Define molar mass.

Back

The mass of one mole of a substance, typically expressed in grams per mole (g/mol).

Front

How do you calculate the molar mass of a compound?

Back

Add the molar masses of all the elements in the compound, multiplied by their respective number of atoms.

Front

What is the percent composition of an element in a compound?

Back

The mass percentage of that element in the total mass of the compound.

Front

What is the formula for calculating the mass of an element in a compound?

Back

Mass of element = (Percent composition / 100) x Total mass of compound.

Front

What is the significance of percent composition in chemistry?

Back

It helps in understanding the composition of compounds and is useful in stoichiometric calculations.