32 amu of Helium contains :

Options

A. 8 mol of He atoms.
B. 5 He atoms.
C. 5 mol of He atoms.
D. 8 He atoms.

Explanation

To solve the question "32 amu of Helium contains:", we need to determine how many atoms of Helium are present in 32 atomic mass units (amu).

### Step-by-Step Solution:

1. **Understand the Atomic Mass of Helium**:
- The atomic mass of Helium is approximately 4 amu. This means that one atom of Helium weighs 4 amu.

2. **Determine the Number of Atoms in 32 amu**:
- To find out how many atoms are in 32 amu, we can use the relationship between the atomic mass and the number of atoms.
- Since 1 atom of Helium = 4 amu, we can set up the following proportion:
\[ \text{Number of atoms} = \frac{\text{Total mass in amu}}{\text{Mass of one atom in amu}} = \frac{32 \text{ amu}}{4 \text{ amu/atom}} \]

3. **Calculate the Number of Atoms**:
- Now, we perform the calculation:
\[ \text{Number of atoms} = \frac{32}{4} = 8 \]
- Therefore, 32 amu of Helium contains 8 atoms of Helium.

### Final Answer:
32 amu of Helium contains **8 atoms of Helium**.

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