1Hz = 1 cycle per second
19 cycles / .5 seconds = 38Hz
You should use the joules (J) unit of measurement.
The chemical purpose of heating the MnSO4⋅H2O is to eliminate water with the formation of new compounds.
<h3>Dehydration reactions</h3>
Dehydration reaction is a type of chemical reaction that involves the removal of water which would eventually lead to the formation of a new compound.
The molecule of MnSO4⋅H2O contains a molecule of water(H2O). After heating of the molecule, water is lost giving rise to the dry compound MnSO4.
Other examples of dehydration reactions are:
- Reactions that produce acid anhydrides.
- Reactions that involve the production of polymers.
- Reaction of sucrose with concentrated sulfuric acid
Therefore, the chemical purpose of heating the MnSO4⋅H2O is to eliminate water with the formation of new compounds.
Learn more about dehydration here:
brainly.com/question/12261974
