Nomenclature, Molar Mass, % Composition

Front

What is the percent composition of a compound?

Back

The percent composition of a compound is the percentage by mass of each element in the compound, calculated by dividing the mass of each element by the total molar mass of the compound and multiplying by 100.

Front

How do you calculate the molar mass of a compound?

Back

To calculate the molar mass of a compound, sum the molar masses of all the atoms in the compound's formula, using the periodic table for atomic weights.

Front

What is the molar mass of Copper (I) Sulfide (Cu2S)?

Back

The molar mass of Copper (I) Sulfide is approximately 159.16 g/mol.

Front

What is the formula for calculating percent composition?

Back

Percent Composition = (mass of element in 1 mole of compound / molar mass of compound) x 100%.

Front

What is the correct name for the compound with the formula BrO3?

Back

The correct name is bromine trioxide.

Front

What are the units of molar mass?

Back

The units of molar mass are grams per mole (g/mol).

Front

Which compound has the smallest molar mass: CO, CO2, H2O, or H2O2?

Back

H2O (water) has the smallest molar mass, approximately 18.02 g/mol.

Front

What is the molar mass of Iron (II) Nitrate (Fe(NO3)2)?

Back

The molar mass of Iron (II) Nitrate is approximately 179.86 g/mol.

Front

Define the term 'nomenclature' in chemistry.

Back

Nomenclature in chemistry refers to the system of naming chemical compounds and their structures.

Front

What is the significance of the Roman numeral in Iron (II) Nitrate?

Back

The Roman numeral indicates the oxidation state of the metal; in this case, Iron (II) means Iron has a +2 charge.