If you don't have the mass, but you've got avagadros and the mr then why do you divide by avagadros instead of multiplying because mass is moles times the mr

Which of the following is not a difference between a compound and a mixture? 1 some mixtures are homogenous, while others are heterogeneous. all compounds are homogeneous. 2 mixtures are homogeneous while compounds are heterogeneous. 3 no chemical bonding occurs between the components of a mixture. the properties of atoms and molecules are not changed when they become part of a mixture. 3 mixtures can be separated by physical means, for example, straining, filtering, or evaporation. 4compounds can only be separated into their constituent atoms by chemically breaking bonds.