Answer:
The statement which describes an intensive property of matter is - :
<u>it is the same for every sample of a single substance.</u>
Explanation:
- <u>It is the same for every sample of a single substance. -:</u> Since a substance 's intense property does not depend on either mass or volume, it is the same for each sample of a single substance. <u>Hence , this statement is correct .</u>
- <u>It depends on how a substance was formed -:</u> Intensive property do not depend upon the amount of the substance or the formation of the sample . <u>Therefore this statement ifs wrong about intensive property .</u>
- <u>It is the same for every sample of every substances -: </u> This is not possible to be for every sample of the substance , a every substance have different qualities. <u>Hence this statement is also incorrect.</u>
- <u>it depends on the amount of substances present -: </u> This is the characteristic of a extensive property of matter that relies on the amount of the material/substance.<u> This assertion is, therefore, not valid.</u>
Hence ,<u> the correct option is A (it is the same for every sample of a single substance).</u>
Answer:
Pure water has an acidity of about 7 on the pH scale. -is a chemical property of pure water. Pure water has an acidity of about 7 on the pH scale
It’s is a pure substance because nothing is mixed with it and a molecule gas because it’s is a gas and it’s by its self
Answer:
For things that we can not directly observe, we can use indirect observation – which studies the consequences of an action or process. For example, we cannot see the Earth's magnetic field, but we detect it by its effect on a compass.
The correct answer is (C), this is because (A) talks about producing energy as of where fat is a form of storing energy. (B) is talking about a cell that controls its surroundings which, as we know, is not the job of fat. That leaves (D) to rule out as it is a textbook definition of an enzyme.