The molecular weight of Adenosine diphosphate (ADP) [C_{10}H_{15}N_{5}O_{10}P_{2}] is 427.202223996.

Adenosine diphosphate (C_{10}H_{15}N_{5}O_{10}P_{2}) is an organic compound of five elements: Carbon, Hydrogen, Nitrogen, Oxygen and Phosphorus. The molecular weight of Adenosine diphosphate is 427.202223996 which can be calculated by adding up the total weight (atomic weight multiplied by their number) of all its elements.

**CALCULATION PROCEDURE: Adenosine diphosphate [C**_{10}H_{15}N_{5}O_{10}P_{2}] Molecular Weight Calculation

_{10}H

_{15}N

_{5}O

_{10}P

_{2}] Molecular Weight Calculation

**Step 1: Find out the chemical formula and determine constituent atoms and their number in an Adenosine diphosphate molecule.**From the chemical formula, you will know different atoms and their number in an Adenosine diphosphate molecule. Chemical formula of Adenosine diphosphate is C

_{10}H

_{15}N

_{5}O

_{10}P

_{2}. From the chemical formula of Adenosine diphosphate, you can find that one molecule of Adenosine diphosphate consists of ten Carbon (C) atoms, fifteen Hydrogen (H) atoms, five Nitrogen (N) atoms, ten Oxygen atoms, and two Phosphorus (P) 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)

Atomic weight of Phosphorus (P): 30.973761998 (Ref: Jlab-ele015)

**Step 3: Calculate the total weight of each atom in an Adenosine diphosphate molecule by multiplying its atomic weight by its number.**

Number of Carbon atoms in Adenosine diphosphate: 10

Atomic weight of Carbon (C): 12.0107

Total weight of Carbon atoms in Adenosine diphosphate: 12.0107 x 10 = 120.107

Number of Hydrogen atoms in Adenosine diphosphate: 15

Atomic weight of Hydrogen (H): 1.008

Total weight of Hydrogen atoms in Adenosine diphosphate: 1.008 x 15 = 15.12

Number of Nitrogen atoms in Adenosine diphosphate: 5

Atomic weight of Nitrogen (N): 14.00674

Total weight of Nitrogen atoms in Adenosine diphosphate: 14.00674 x 5 = 70.0337

Number of Oxygen atoms in Adenosine diphosphate: 10

Atomic weight of Oxygen (O): 15.9994

Total weight of Oxygen atoms in Adenosine diphosphate: 15.9994 x 10 = 159.994

Number of Phosphorus atoms in Adenosine diphosphate: 2

Atomic weight of Phosphorus (P): 30.973761998

Total weight of Phosphorus atoms in Adenosine diphosphate: 30.973761998 x 2 = 61.947523996

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

Molecular weight of Adenosine diphosphate: 120.107 (Carbon) + 15.12 (Hydrogen) + 70.0337 (Nitrogen) + 159.994 (Oxygen) + 61.947523996 (Phosphorus) = 427.202223996

So the molecular weight of Adenosine diphosphate is 427.202223996.

Adenosine diphosphate [C_{10}H_{15}N_{5}O_{10}P_{2}] Molecular Weight Calculation

Molecular weight of Adenosine diphosphate [C_{10}H_{15}N_{5}O_{10}P_{2}] | |||

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

Carbon (C) | 10 | 12.0107 | 120.107 |

Hydrogen (H) | 15 | 1.008 | 15.12 |

Nitrogen (N) | 5 | 14.00674 | 70.0337 |

Oxygen (O) | 10 | 15.9994 | 159.994 |

Phosphorus (P) | 2 | 30.973761998 | 61.947523996 |

Molecular weight of Adenosine diphosphate [C_{10}H_{15}N_{5}O_{10}P_{2}]: | 427.202223996 |

## 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
- Jlab-ele015: https://education.jlab.org/itselemental/ele016.html