Chapter 7a - molar mass

Front

What is molar mass?

Back

Molar mass is the mass of one mole of a substance, typically expressed in grams per mole (g/mol). It is calculated by summing the atomic masses of all atoms in a molecule.

Front

How do you calculate the molar mass of a compound?

Back

To calculate the molar mass, multiply the atomic mass of each element by the number of atoms of that element in the compound, then sum all the values.

Front

What is the molar mass of potassium chloride (KCl)?

Back

The molar mass of KCl is approximately 74.55 g/mol (39.10 g/mol for K and 35.45 g/mol for Cl).

Front

What is Avogadro's number?

Back

Avogadro's number is 6.02 x 10^23, which is the number of particles (atoms, molecules, etc.) in one mole of a substance.

Front

How many molecules are in 1 mole of a substance?

Back

There are 6.02 x 10^23 molecules in 1 mole of a substance.

Front

What is the significance of a balanced chemical equation?

Back

A balanced chemical equation shows the conservation of mass, indicating that the number of atoms of each element is the same on both sides of the equation.

Front

What does the coefficient in a chemical equation represent?

Back

The coefficient represents the number of moles of each substance involved in the reaction.

Front

How do you determine the mole ratio from a balanced equation?

Back

The mole ratio is determined by the coefficients of the reactants and products in the balanced equation.

Front

What is the molar mass of graphite (C)?

Back

The molar mass of graphite (carbon) is approximately 12.01 g/mol.

Front

Which element has the highest molar mass: Hydrogen, Iron, Carbon, or Cobalt?

Back

Cobalt has the highest molar mass among the options, approximately 58.93 g/mol.