Answer to Question #112460 in General Chemistry for jovanni

Question

On Planet GOCUBSGO one atomic mass unit is defined as 1/48th of the mass of a single carbon-12 atom. How would this effect the value of Avogadro’s Number? Provide a calculation or explanation to support your reasoning.

Answer 1

An atomic mass unit is defined as 1⁄12 of the mass of a 12C free resting carbon atom in the ground state. 1 a.m. u., expressed in grams, is practically numerically equal to the reciprocal Avogadro number (moreover, before changing the definition of a mole through fixing the Avogadro number, the equality was exact), i.e. 1 / N_A, expressed in mol ^ −1. The molar mass of a certain substance, expressed in grams per mole, numerically coincides with the mass of the molecule of this substance, expressed in a. m. u.

If a.m.u. is 1/48, no 1/12, N_A enlarged to 4.