How many total protons are found in one molecule of retinol `(C_(20_H_(30)O)`?

Options

A. 51
B. 151
C. 600
D. 158

Explanation

To determine the total number of protons in one molecule of retinol (C20H30O), we will follow these steps:

### Step 1: Identify the number of each type of atom in the molecule.
- The molecular formula of retinol is C20H30O.
- This indicates that there are:
- 20 Carbon (C) atoms
- 30 Hydrogen (H) atoms
- 1 Oxygen (O) atom

### Step 2: Find the atomic number of each element.
- The atomic number corresponds to the number of protons in an atom:
- Carbon (C) has an atomic number of 6 (thus, 6 protons).
- Hydrogen (H) has an atomic number of 1 (thus, 1 proton).
- Oxygen (O) has an atomic number of 8 (thus, 8 protons).

### Step 3: Calculate the total number of protons contributed by each type of atom.
- For Carbon:
- Total protons from Carbon = Number of Carbon atoms × Atomic number of Carbon
- Total protons from Carbon = 20 × 6 = 120 protons

- For Hydrogen:
- Total protons from Hydrogen = Number of Hydrogen atoms × Atomic number of Hydrogen
- Total protons from Hydrogen = 30 × 1 = 30 protons

- For Oxygen:
- Total protons from Oxygen = Number of Oxygen atoms × Atomic number of Oxygen
- Total protons from Oxygen = 1 × 8 = 8 protons

### Step 4: Sum the total number of protons from all the atoms.
- Total protons = Total protons from Carbon + Total protons from Hydrogen + Total protons from Oxygen
- Total protons = 120 + 30 + 8 = 158 protons

### Conclusion:
The total number of protons in one molecule of retinol (C20H30O) is **158**.

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