In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.

[Q]: Question: When gas particles collide, what kinds of collisions are these considered? Answer: elastic
[A]: When gas particles collide, these collisions are considered elastic.


[Q]: Question: What property is the result of the force of gravity being opposed by the normal force? Answer: weight
[A]: Weight is the result of the force of gravity being opposed by the normal force.


[Q]: Question: What is composed of a calcium cation and a nitrate anion? Answer: calcium nitrate
[A]:
Calcium nitrate is composed of a calcium cation and a nitrate anion.