The molecular weight of Isobutyraldehyde [(CH_{3})_{2}CHCHO] is 72.1062.

To calculate molecular weight of any compound, the first step is to know the constituent atoms and their number in that particular compound. Then calculate the total weight of each atom by multiplying its atomic weight by its number. The sum of total weight of all constituent atoms will be the molecular weight of the compound. Note that the value of atomic weight may differ slightly from different sources.

**CALCULATION PROCEDURE: Isobutyraldehyde [(CH**_{3})_{2}CHCHO] Molecular Weight Calculation

_{3})

_{2}CHCHO] Molecular Weight Calculation

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

_{4}H

_{8}O. From the chemical formula of Isobutyraldehyde, you can find that one molecule of Isobutyraldehyde has four Carbon (C) atoms, eight Hydrogen (H) atoms and one Oxygen (O) atom.

**Step 2: Find out atomic weights of each atom (from 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 Oxygen (O) : 15.9994 (Ref: Jlab-ele008)

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

Number of Carbon atoms in Isobutyraldehyde: 4

Atomic weight of Carbon (C): 12.0107

Total weight of Carbon atoms in Isobutyraldehyde: 12.0107 x 4 = 48.0428

Number of Hydrogen atoms in Isobutyraldehyde: 8

Atomic weight of Hydrogen (H): 1.008

Total weight of Hydrogen atoms in Isobutyraldehyde: 1.008 x 8 = 8.064

Number of Oxygen atoms in Isobutyraldehyde: 1

Atomic weight of Oxygen (O): 15.9994

Total weight of Oxygen atoms in Isobutyraldehyde: 15.9994 x 1 = 15.9994

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

Molecular weight of Isobutyraldehyde: 48.0428 (Carbon) + 8.064 (Hydrogen) + 15.9994 (Oxygen) = 72.1062

So the molecular weight of Isobutyraldehyde is 72.1062.

Isobutyraldehyde [(CH_{3})_{2}CHCHO] Molecular Weight Calculation

Molecular weight of Isobutyraldehyde | |||

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

Carbon (C) | 4 | 12.0107 | 48.0428 |

Hydrogen (H) | 8 | 1.008 | 8.064 |

Oxygen (O) | 1 | 15.9994 | 15.9994 |

Molecular weight of Isobutyraldehyde: | 72.1062 |

## REFERENCES:

- Lanl-1: https://periodic.lanl.gov/1.shtml
- Pubchem-Hydrogen : https://pubchem.ncbi.nlm.nih.gov/element/Hydrogen
- Jlab-ele006; https://education.jlab.org/itselemental/ele006.html
- Pubchem-6: https://pubchem.ncbi.nlm.nih.gov/element/6
- Jlab-ele008: https://education.jlab.org/itselemental/ele008.html
- Pubchem-8: https://pubchem.ncbi.nlm.nih.gov/element/8