Molar Mass help

Question

What is the molar mass of

Acetic Anhydride

Acetylsalicylic Acid

Acetic Acid

Please show work

Answer 1

The molar mass of any compound is the sum of the atomic masses of the atoms in the formula.

The formulas for Acetic Acid is C₂H₄O₂ Acetic Anhydride C₄H₆O₃ Acetyl Salicilic Acid C₉H₈O₆

The atomic masses are C 12.011, H 1.008 O 15.999 The atomic masses differ slightly in different tables depending on the standard used.

For Acetic Acid the answer is sum of (2* 12.011) + (4 * 1.008) + (2 * 15.999) = Molecular Mass

The solution for the others is obtained by multiplying the atomic masses by the appropriate number of atoms.

I leave the arithmetic to the student.