What is molar mass?

a) The mass of one mole of atoms, molecules, compounds, etc. in grams.

b) The mass of one atom, one molecule, one compounds, etc. in amu.

c) The number of atoms, molecules, compounds, etc. needed to make one grams of total sample.

d) The formula weight of one atom, one molecule, one compound, etc. in grams.

a) The mass of one mole of atoms, molecules, compounds, etc. in grams.