Which Piece Of evidence best demonstrate a link between brain function and kindness

How does gatsby smile at nick? why is this important?

You need to start an experiment and the instructions are to mix 2 g of sodium bicarbonate with 50 ml of distilled water and then mix the solution. describe what lab apparatus you would use and what safety precautions you must observe when completing this experiment.

What does a change in medium allow the audience to do?