In a mechanical cycle, mechanical energy (mostly the the rotation) is used to get the desired result. The form of energy remains the same.
<span>In a thermodynamic cycle heat is converted to mechanical energy. That is to say there is conversion of energy.</span>
That would be an amino acid. The

and -COOH is the functional group for a carboxylic acid hence AMINO ACID.
The property that the scientist was most likely investigating was the solubility of the crystals.
Answer:
Sodium chloride, on the other hand, contains ions; it is an ionic compound. CaO is correct.
Explanation: