A student adds a few drops of phenolphthalein to a clear solution and it imediately turns pink (fuschia). Next, the student starts adding a second clear solution to the pink soluton and it slowly turns back to a clear colorless solution. What was the identity of the second solution that was added?

One mole of zinc has a mass of 65.4 grams. approximately how many atoms of zinc are present in one mole of zinc? 32 × 1023 atoms 6 × 1023 atoms 66 atoms 65 atoms

If we compare and contrast electromagnetic waves with sound waves, all but one statement is true. that is a) sound waves require a medium to travel while electromagnetic waves do not. b) electromagnetic waves can travel through the vacuum of space while sound waves cannot. c) electromagnetic waves must have a medium in which to travel, but sound waves can travel anywhere. eliminate d) sound waves must bounce off of matter in order to travel while electromagnetic waves do not require matter to be present.

50 points - answer entirely - will reward brainliest