there are four sketches below. the first sketch shows a sample of substance x. the three sketches underneath…

there are four sketches below. the first sketch shows a sample of substance x. the three sketches underneath it show three different changes to the sample. you must decide whether each of these changes is possible. if a change is possible, you must also decide whether it is a physical change or a chemical change. each sketch is drawn as if the sample were under a microscope so powerful that individual atoms could be seen. also, you should assume that you can see the entire sample, and that the sample is in a sealed box, so that no matter can enter or leave.\n\nsample of substance x\n\nchange 1\n\nchange 2\n\nchange 3\n\nchange 1 is:\nimpossible\na physical change\na chemical change\n\nchange 2 is:\nimpossible\na physical change\na chemical change\n\nchange 3 is:\nimpossible\na physical change\na chemical change

there are four sketches below. the first sketch shows a sample of substance x. the three sketches underneath it show three different changes to the sample. you must decide whether each of these changes is possible. if a change is possible, you must also decide whether it is a physical change or a chemical change. each sketch is drawn as if the sample were under a microscope so powerful that individual atoms could be seen. also, you should assume that you can see the entire sample, and that the sample is in a sealed box, so that no matter can enter or leave.\n\nsample of substance x\n\nchange 1\n\nchange 2\n\nchange 3\n\nchange 1 is:\nimpossible\na physical change\na chemical change\n\nchange 2 is:\nimpossible\na physical change\na chemical change\n\nchange 3 is:\nimpossible\na physical change\na chemical change

Answer

Explanation:

Step1: Analyze Change 1

The molecules in the original sample of Substance X are single - atom entities. In Change 1, the atoms combine to form molecules of three - atom entities. Since new chemical bonds are formed, it is a chemical change and is possible as the total number of atoms is conserved.

Step2: Analyze Change 2

The original sample has only red atoms. In Change 2, there are now red and gray atoms. Since no matter can enter or leave the sealed box, the appearance of a new type of atom is impossible.

Step3: Analyze Change 3

The arrangement of the atoms in the sample has changed, but the nature of the atoms and molecules remains the same. This is a physical change as no new substances are formed and it is possible.

Answer:

Change 1 is: a chemical change Change 2 is: impossible Change 3 is: a physical change