To calculate the mass of 0.61 moles of Vaseline (C15H15N), we need to determine the molar mass of Vaseline first. The molar mass is the sum of the atomic masses of all the atoms in the molecular formula.
Given:
- Atomic mass of C (carbon) = 12.0 g/mol
- Atomic mass of H (hydrogen) = 1.0 g/mol
- Atomic mass of N (nitrogen) = 14.0 g/mol
- Molecular formula of Vaseline = C15H15N
Now, let's calculate the molar mass of Vaseline: Molar mass of Vaseline = (15 * Atomic mass of C) + (15 * Atomic mass of H) + (1 * Atomic mass of N)
Molar mass of Vaseline = (15 * 12.0 g/mol) + (15 * 1.0 g/mol) + (1 * 14.0 g/mol) Molar mass of Vaseline = 180.0 g/mol + 15.0 g/mol + 14.0 g/mol Molar mass of Vaseline = 209.0 g/mol
Now that we know the molar mass of Vaseline is 209.0 g/mol, we can calculate the mass of 0.61 moles of Vaseline using the formula:
Mass = Number of moles × Molar mass
Mass = 0.61 moles × 209.0 g/mol Mass = 127.49 grams
Therefore, the mass of 0.61 moles of Vaseline is approximately 127.49 grams.