Justin mixed two clear liquids together during an experiment and made the following observations: the mixed liquids decreased in temperature without any refrigeration or other action to change the temperature. the color of the liquid changed to blue. which statement best describes justin’s experiment? a. a physical change occurred, and this caused the liquid’s chemical properties to change. b. a chemical change occurred, and this caused the liquid’s physical properties to change. c. a physical change occurred, so only physical properties changed. d. a chemical change occurred, so only chemical properties changed.

B. A chemical change occurred which caused the liquid's physical properties to change.

Explanation:

The reduction of the temperature of the system meant that the reaction absorbed heat energy from it. This shows that a chemical reaction was in progress. New products were formed, and this is proved by the change in the color to blue.  

fr8t7iot7o87oglgt87ot79p0[90

question: ray weighs 100 kilograms, his wrestling partner, bobby, weighs 50 kilograms. if ray moves at 4 m s , how fast will bobby have to run at him to apply an equal amount of kinetic energy?

answer: 8 m/s he needs to run twice as fast to keep up so he has some work to do

explanation:   if the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.

question answered by

(jacemorris04)