Which change of phase is exothermic? A) H2O(s) → H2O(g)
B) CO2(s) + CO2(l)
C) H2S(g) + H2S(l)
D) NH3(l) → NH3(g)

Mrs. smith ordered a root beer float (vanilla ice cream + root beer). mrs. smith noticed that the three states of matter (solid, liquid, and gas) all existed simultaneously in her root beer float. a. identify each phase of matter in the root beer float. b. describe the particles of all three phases of matter in the root beer float. (how are the particles arranged and moving? ) c. identify one phase change you would see in a root beer float and described what causes this change.

Llama have 74 chromosomes how many chromosomes will they be found in their gametes explain how you know

This element exists in adundance in the sun.explain how you would go about capturing sunlight.would this captured sunlight contain any of the element?