5H2 + 5Cl2 - 500 kj - - - > 10 HCl This equation is Exothermic or Endothermic, and the kj next to the chlorine what does it indicates as i know that the molar enthalpy is written next to the equation not in it ​

This large tectonic plate is bounded on three sides by whats know as the ring of fire. what is the name of this tectonic plate? a) pacific plate b) eurasian plate c) north american plate d) indo- australian plate plz it's science but there's no option for science so i picked chemistry

What happens to the average kinetic energy of a gas when the particles of the gas collide against each other at a constant temperature and volume? explain your answer.

Calculate the frequency of a wave in a spring toy. the wave has a speed of 1.1 meters per second and a wavelength of 0.1 meters. *