In chemistry, some changes are reversible and some are irreversible, explain.

Calculate the ph at the equivalence point for the titration of a solution containing 150.0 mg of ethylamine (c2h5nh2) with 0.1000 m hcl solution. the volume of the solution at the equivalence point is 250.0 ml. kb forethylamine is 4.7 × 10−4 .

Which of the following isotopes has the same number of neutrons as phosphorus-31?

My dog made become frightened and cover when he hears loud thunder this is an example of a reaction to what kind of stimuli a. chemicalsb. lightc. touchd. sound