Question

Determine the molecular mass of the following compounds:

a) CH₃OH
b) C₂H₅COOH
c) H₂O₂
d) Na₂CO₃

Answer 1

To determine the molecular mass of a compound, you sum the atomic masses of all the atoms it contains. The provided compounds, CH₃OH, C₂H₅COOH, H₂O₂, and Na₂CO₃, have molecular masses of 32.04 g/mol, 60.05 g/mol, 34.016 g/mol, and 105.988 g/mol, respectively.

Step-by-step explanation:

To determine the molecular mass of a compound, you add the atomic masses of all the atoms in the molecule. Here are the calculations for the compounds you listed:

• CH₃OH (Methanol): The molecular mass is (12.01 * 1) + (1.008 * 4) + (16.00 * 1) + (1.008 * 1) = 32.04 g/mol.
• C₂H₅COOH (Acetic Acid): The molecular mass is (12.01 * 2) + (1.008 * 4) + (12.01 * 1) + (16.00 * 2) + (1.008 * 1) = 60.05 g/mol.
• H₂O₂ (Hydrogen Peroxide): The molecular mass is (1.008 * 2) + (16.00 * 2) = 34.016 g/mol.
• Na₂CO₃ (Sodium Carbonate): The molecular mass is (22.99 * 2) + (12.01 * 1) + (16.00 * 3) = 105.988 g/mol.

Simply find the atomic mass of each atom, multiply it by the number of times that atom appears in the formula, and sum these values for each atom type to find the total molecular mass of the compound.