Question

what is the atomic mass of 1 atom of carbon - 12?
a 12.011 g
b 12 amu
c 12.011 amu
d 12 g

Explanation:

Step1: Recall carbon - 12 definition

By definition, one atom of carbon - 12 has an atomic mass of 12 atomic mass units (amu). The average atomic mass of carbon (12.011 amu) takes into account the different isotopes of carbon and their abundances. And grams are used for macroscopic amounts, not for a single atom.

Answer:

B. 12 amu