Energy passes from the suns core through a dense region called the what?

Which is a characteristic of mixtures?

Kc = 0.040 for the system below at 450oc. if a reaction is initiated with 0.40 mole of cl2 and 0.40 mole of pcl3 in a 2.0 liter container, what is the equilibrium concentration of cl2 in the same system? pcl5(g) ⇄ pcl3(g) + cl2(g)

Apiece of metal with a length of 1.42 cm was measured using four different instruments. which of the following measurements is the most accurate?