4.2 Molar Mass

Question 1

What is molar mass

Answer 1

The molar mass of an element is defined as the mass of exacty 1 mol (6.02 x 1023atoms) of that element. It is used to convert between mass (grams) and mols.

Question 2

Why do we need molar mass

Answer 2

Since scientists can’t measure moles they need to calculate them based on the molar mass

Question 3

What is molar mass of compounds

Answer 3

Molar mass of a compound is the molar mass of each of the atoms it holds added together, 1 mole of CO has 1 mole of carbon + 1 mole of oxygen, 1 mole of H2O has 2 moles of hydrogen + 1 mole of oxygen. determine the molar mass and added them together

Question 4

What do we use to convert between grams, moles, particles, molecules, and atoms

Answer 4

MOLAR MASS - converts between grams and moles
AVOGADRO’S NUMBER - converts between moles and particles
CHEMICAL FORMULA - converts between molecules and atoms