Which of the following examples involves an exothermic change. a. ice melting on a warm day

b. water boiling in a tea kettle

c. gaseous water particles coming together to form fog

d. air in a bicycle tire gaining pressure after a long ride

Which of the following ocean acidification? are the most likely side effects of a ph less than 7.0 in the ocean b. more metal salts altering the ocean chemistry c. dissolution of the shells of marine organisms d. both a & b e. all of the above.

What type of organic molecule comprises the majority of a potato?

Consider hydrogen in an excited state n = 5n=5 that emits photons to reach the ground state. there are various possible transitions other than straight to the ground state that can occur; for example, it can drop to the n = 3n=3 state followed by the n = 3n=3 to the ground state transition. which of the possible transitions will result in the emission of a photon in the visible region?