Think about what you know about the motion and spacing of the particles in each state of matter. how can this illustration of people at the theater be used as a model of solids, liquids, and gases? explain which group of people best represents the particles in a solid, liquid, and gas.

attractions between particles in matter hold the particles of liquids and solids close together. why do you think the attraction that particles have for each other is not enough to keep the particles in a gas close together? does the number of particles change as a gas spreads out?

think about the properties you have observed for solids, liquids, and gases. how might the arrangement and motion of the particles in each state result in these properties? describe and/or draw how you would model the particles in a solid, liquid, and gas.

Yes, endothermic means it turns cold. and some chemical changes include change of tempature.

Answerthis solution will not form a precipitateexplanationsolubility equilbrium:         pbf₂(s)  ⇄ pb²⁺(aq) + 2 f⁻(aq)the solubility product expression is    (we exclude solids from the equilibrium expression).now suppose we have the trial ion product q, which we can define as    then, we can interpret  q as the product of the concentration of the ions that we have and ksp as the product of the ion concentrations that are needed to form a saturated solution.if q > ksp, then that implies that there will be a surplus of ions that exceed the amount that is required to form a saturated solution. a precipitate will then form (the precipitate continually  forms until the surplus ions are removed and q is decreased to ksp's value).if q = ksp, the saturated solution that forms is barely saturated and the precipitate will be minimal.if q < ksp, then the ion concentration will not be enough to form a saturated solution (so no precipitate).using our information, we calculate the trial ion product:     since q = 2.7  × 10⁻⁸ < ksp =  4  ×  10⁻⁸, a precipitate will not form.

Answer/nitrogen compounds in the soil;