Electrons because they are negatively charged and are the heaviest subatomic particle
In order to dissolve a chemical sample in a recrystallization solvent, add the room-temperature solvent just until it covers the sample in an Erlenmeyer flask on a hot plate.
<h3>What is recrystallization solvent?</h3>
Recrystallization involves dissolving the material to be purified (the solute) in an appropriate hot solvent.
Recrystallization, also known as fractional crystallization, is a procedure for purifying an impure compound in a solvent.
The method of purification is based on the principle that the solubility of most solids increases with increased temperature. Small crystals may trap impurities.
Thus, in order to dissolve a chemical sample in a recrystallization solvent, add the room-temperature solvent just until it covers the sample in an Erlenmeyer flask on a hot plate. Turn on the heat, starting at a low setting and increasing gradually.
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The bonds in a substance breaks down in a phase change from liquid to gas and the molecules move independently of each other.
It is conventional to describe chemical bonds with the aid of elastic materials such as a rubber band. This analogy can only apply to covalent bonds between atoms in which the bonds between atoms are stretched.
However, in discussing the bonds in a substance when considering phase changes, this analogy breaks down because for a phase change from liquid to gas, the bonds break completely and particles can move independently of each other.
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Entropy is a measure of chaos or disorder in a system. For the first one, the system with the highest entropy is a cup of water at 0 degress centigrade. For the second question, the system with the lowest entropy is sugar crystals in 95 degrees centigrade cup of coffee.
Answer:
open system
Explanation:
An open system is a system in which both energy and matter are exchanged with the surroundings.
