Question

Calculate the molecular weights of both sucrose and myristic acid, by summing the contributions from C, H and O atoms and enter your data in the table below. (Useful data: relative atomic masses C 12.01, H 1.01, O 16.00).

Answer 1

Answer:

Sucrose 342.34

Mysristic acid 228.42

Explanation:

The first step is to write out the formula of the substance in question. Let us start with sucrose. $C_{12} H_{22} O_{11}$. Then use that to help you determine the molecular weights using the relative atomic mass of each species.

molecular weight = (12.01*12) + (1.01*22) + (16.00*11) = 342.34

Be sure to write no units for this answer. This is not the molar mass, this is the relative molecular mass. It's on a relative scale not in grams

We repeat the steps above for mysristic acid, formula $C_{14} H_{28} O_{2}$.

molecular weight = (12.01*14) + (1.01*28) + (16*11) = 228.42