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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Answer:
300kg
Explanation: The question says about 30%, so I think it is 300kg
<h3>During physical changes, the composition od the original substance is not altered, but the properties of the original substance are altered. During a chemical change the composition od the original substance is not altered and the change is irreversible. Melting of butter and wax is an example of chemical changes.</h3>
<span>19. Single displacement reactions are always redox reactions (they include reaction between an element and a compound where they will take place of another element in that compound).
20. It should be single displacement, where the displaced ion would form gas.</span>