Explain why an empirical formula alone cannot be used to derive the actual molecular formula for a given compound. Provide one or more examples.

Because an empirical formula only shows the most simple ratio between elements in a compound while the molecular formula gives the actual number of each element in a certain molecule. Take the example of glucose. It has a molecular formula of . However, the smallest ratio between the atoms are 1:2:1 respectively. So the empirical formula would be . Clearly not representing the molecular formula.

Explanation:

the increase of protons   hope this

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.