Question

When you add up the mass of each element in a mol of a compound, the sum of these masses is the ?.

Answer 1

The sum of the masses of all the elements in a mole of a compound is called the molar mass of the compound.

Step-by-step explanation:

The sum of the masses of all the elements in a mole of a compound is called the molar mass of the compound. The molar mass is calculated by adding up the atomic masses of each element present in the compound, multiplied by the number of atoms of that element in the molecular or empirical formula.

For example, let's calculate the molar mass of water (H2O):

• Molar mass of hydrogen (H): 1.008 g/mol
• Molar mass of oxygen (O): 15.999 g/mol
• Total molar mass of water: (2 x 1.008) + 15.999 = 18.02 g/mol

Therefore, the sum of the masses of each element in a mole of a compound is the molar mass of the compound.