When determining whether a chemical reaction has taken place, you observe and look for several indicators. which would be considered an indication that a chemical reaction or chemical change has taken place? a) solid melts. b) heat is given off. c) substance dissolves d) substance changes shape.

the answer is b i just got it right on usatestprep

state the principle of separating two immiscible liquids by separating funnel. describe an activity with diagram to separate a mixture of water and kerosene oil. answer: immiscible layers separate out in layers depending on their densities in separating funne

quartz

explanation: