a student puts some sugar in a glass of water and stirs until the sugar is dissolved. why is sugar…

a student puts some sugar in a glass of water and stirs until the sugar is dissolved. why is sugar dissolving in water an example of a physical change? a. because the sugar and water are both clear b. because the sugar gives off gas bubbles when it is dissolved in the water c. because the student started with sugar and water, and ended with sugar and water d. because the sugar and water molecules break apart, and then recombine in different ways

a student puts some sugar in a glass of water and stirs until the sugar is dissolved. why is sugar dissolving in water an example of a physical change? a. because the sugar and water are both clear b. because the sugar gives off gas bubbles when it is dissolved in the water c. because the student started with sugar and water, and ended with sugar and water d. because the sugar and water molecules break apart, and then recombine in different ways

Answer

Brief Explanations:

In a physical change, the substances involved retain their chemical identities. When sugar dissolves in water, sugar molecules disperse among water molecules but no new substances are formed chemically. Sugar and water remain sugar and water. Option A is about appearance, not the nature of the change. Option B - giving off gas bubbles indicates a chemical reaction usually. Option D - breaking - apart and recombining in different ways is characteristic of a chemical change.

Answer:

C. because the student started with sugar and water, and ended with sugar and water