Carbon has an atomic mass of 12.0 amu. A carbon sample with a mass of 12.0 g contains 6.02 × 1023 of carbon.

The text you provided is not a question, but a statement. However, it seems like it's leading to a question about Avogadro's number or the concept of a mole in chemistry.

The atomic mass unit (amu) is a standard unit of mass that quantifies mass on an atomic or molecular scale. The atomic mass of carbon is 12.0 amu.

A mole is a unit of measurement used in chemistry to express amounts of a chemical substance. Avogadro's number (6.02 x 10^23) is the number of atoms or molecules in one mole of any substance.

In your statement, you mentioned that a 12.0 g sample of carbon contains 6.02 x 10^23 atoms of carbon. This is essentially the definition of a mole. So, your statement is saying that 12.0 g of carbon is equal to one mole of carbon.