What are thermal plasmas? plasmas that have particles that collide infrequently
plasmas that reach a temperature equal to their surroundings
plasmas that do not reach thermal equilibrium
plasmas that have only a few particles ionized at any given moment

An empty fuel tank can still contain and therefore can be even more dangerous than one full of liquid fuel.

Which of the following shapes would represent a molecule with two bonded atoms and 3 lone pairs on only one of them , trigonal planar , bent , trigonal pyramidal , linear

When the chemicals iron sulfide (fes) and hydrochloric acid (hcl) are combined, bubbles appear from the mixture. 1. does the appearance of bubbles indicate a physical or chemical change? 2. why do the bubbles indicate this change? 3. what property is this?