Which of the following why use approximately represent the number of atoms in one mole of golda. 3.26 x 1026b. 2.30 x 106c. 12.04 x 1024d. 6.02 x 1023

Answer is: D. 6.02 x 1023. 
Because this is Avogadro constant (the number of constituent particles, in this example atoms of gold that are contained in the amount of substance given by one mole). The mole is the unit of measurement for amount of substance, the mole is an SI base unit, with the unit symbol mol.

C. chemical changeshope i : )