Define atomic mass unit. Write its energy equivalent in MeV.

Explanation

### Step-by-Step Solution

1. **Definition of Atomic Mass Unit (amu)**:
- The atomic mass unit (amu) is a standard unit of mass that quantifies mass on an atomic or molecular scale. It is defined as one twelfth (1/12) of the mass of a carbon-12 atom. This means that if you take the mass of a carbon-12 atom and divide it by 12, you will get the mass equivalent to 1 amu.

2. **Mass of Carbon Atom**:
- The mass of one mole of carbon (which contains Avogadro's number of atoms, approximately \(6.022 \times 10^{23}\)) is about 12 grams. Therefore, the mass of a single carbon atom can be calculated as:
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