If Avogadro number NA is changed from 6.022×10²³ mol⁻¹ to 6.022×10²⁰ mol⁻¹, this would change: the mass of one mole of carbon; the definition of mass in units of grams; the ratio of chemical species to each other in a balanced equation; the ratio of elements to each other in a compound.

If Avogadro number NA is changed from 6.022×10²³ mol⁻¹ to 6.022×10²⁰ mol⁻¹, this would change the mass of one mole of carbon from 12 g to 12 mg. However the following will remain unchanged: (A) The ratio of chemical species to each other in a balanced equation; (B) The ratio of elements to each other in a compound; (C) The definition of mass in units of grams