The molecular weight of Proline [C_{5}H_{9}NO_{2}] is 115.13104.

Proline (C_{5}H_{9}NO_{2}) is an organic compound of four elements: Carbon, Hydrogen, Nitrogen, and Oxygen. The molecular weight of Proline is 115.13104 which can be calculated by adding up the total weight (atomic weight multiplied by their number) of all its elements.

**CALCULATION PROCEDURE: Proline [C**_{5}H_{9}NO_{2}] Molecular Weight Calculation

_{5}H

_{9}NO

_{2}] Molecular Weight Calculation

**Step 1: Find out the chemical formula and determine constituent atoms and their number in a Proline molecule.**From the chemical formula, you will know different atoms and their number in a Proline molecule. The chemical formula of Proline is C

_{5}H

_{9}NO

_{2}. From the chemical formula, you can find that one molecule of Proline consists of five Carbon (C) atoms, nine Hydrogen (H) atoms, one Nitrogen (N) atom, and two Oxygen atoms.

**Step 2: Find out the atomic weights of each atom (from the periodic table). **

Atomic weight of Carbon (C): 12.0107 (Ref: Jlab-ele006)

Atomic weight of Hydrogen (H): 1.008 (Ref: Lanl-1)

Atomic weight of Nitrogen (N): 14.00674 (Ref: Jlab-ele007)

Atomic weight of Oxygen (O): 15.9994 (Ref: Jlab-ele008)

**Step 3: Calculate the total weight of each atom in a Proline molecule by multiplying its atomic weight by its number.**

Number of Carbon atoms in Proline: 5

Atomic weight of Carbon (C): 12.0107

Total weight of Carbon atoms in Proline: 12.0107 x 5 = 60.0535

Number of Hydrogen atoms in Proline: 9

Atomic weight of Hydrogen (H): 1.008

Total weight of Hydrogen atoms in Proline: 1.008 x 9 = 9.072

Number of Nitrogen atoms in Proline: 1

Atomic weight of Nitrogen (N): 14.00674

Total weight of Nitrogen atoms in Proline: 14.00674 x 1 = 14.00674

Number of Oxygen atoms in Proline: 2

Atomic weight of Oxygen (O): 15.9994

Total weight of Oxygen atoms in Proline: 15.9994 x 2 = 31.9988

**Step 4: Calculate the molecular weight of Proline by adding up the total weight of all atoms.**

Molecular weight of Proline: 60.0535 (Carbon) + 9.072 (Hydrogen) + 14.00674 (Nitrogen) + 31.9988 (Oxygen) = 115.13104

So the molecular weight of Proline is 115.13104.

Proline(C_{5}H_{9}NO_{2}) Molecular Weight Calculation

Molecular weight of Proline (C_{5}H_{9}NO_{2}) | |||

Constituent atoms | Number of each atom | Atomic weight | Total weight |

Carbon (C) | 5 | 12.0107 | 60.0535 |

Hydrogen (H) | 9 | 1.008 | 9.072 |

Nitrogen (N) | 1 | 14.00674 | 14.00674 |

Oxygen (O) | 2 | 15.9994 | 31.9988 |

Molecular weight of Proline (C_{5}H_{9}NO_{2}): | 115.13104 |

## REFERENCES:

- Lanl-1: https://periodic.lanl.gov/1.shtml
- Jlab-ele006: https://education.jlab.org/itselemental/ele006.html
- Jlab-ele007: https://education.jlab.org/itselemental/ele007.html
- Jlab-ele008: https://education.jlab.org/itselemental/ele008.html

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