Which of the following aspects of kinetic-molecular theory explain why a plasma-based light doesn’t get unbearably hot? Select all that apply. Particles exchange energy through elastic collisions.
All particles are in constant random motion.
Particles are small.
Except during collisions, interactions between particles are negligible.
The temperature depends only on the average kinetic energy of the particles.

Which object forms when a supergiant runs out of fuel? a red giant a black hole a white dwarf a neutron star

Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)

Which element is least likely to undergo a chemical reaction