The molar mass of 2,4-pentanedione (also known as acetylacetone) can be calculated by summing the atomic masses of its constituent elements. Let's break down the compound and calculate its molar mass:
2,4-pentanedione (acetylacetone) has the molecular formula C₅H₈O₂.
The atomic masses of the elements are:
- Carbon (C) = 12.01 g/mol
- Hydrogen (H) = 1.008 g/mol
- Oxygen (O) = 16.00 g/mol
Now, we can calculate the molar mass by multiplying the number of atoms of each element by their respective atomic masses and summing them up:
Molar mass of 2,4-pentanedione = (5 * Atomic mass of carbon) + (8 * Atomic mass of hydrogen) + (2 * Atomic mass of oxygen)
Molar mass of 2,4-pentanedione = (5 * 12.01 g/mol) + (8 * 1.008 g/mol) + (2 * 16.00 g/mol)
Calculating the values:
Molar mass of 2,4-pentanedione = 60.05 g/mol + 8.064 g/mol + 32.00 g/mol
Molar mass of 2,4-pentanedione ≈ 100.114 g/mol
Therefore, the molar mass of 2,4-pentanedione (acetylacetone) is approximately 100.114 g/mol.