Which of the following is not an application that uses chemiluminescent reactions?

a: lightning
b: light sticks
c: tarnish polish
d: criminal investigations using luminol to detect blood

! i've been stuck on this question for a while. : )

Harvey kept a balloon with a volume of 348 milliliters at 25.0˚c inside a freezer for a night.  when he took it out, its new volume was 322 milliliters, but its pressure was the same.  if the final temperature of the balloon is the same as the freezer’s, what is the temperature of the freezer? the temperature of the freezer is  kelvins.

Reduction is a reaction which results in a in electrons and a in positive charge of the atom or ion 1) a- loss 1) b- gain 2) a-increase 2) b-decrease

What are the two major rules associated with polarity