Liam loves fishing and wants to try ice fishing. He goes to the library and checks out a book about the topic. What type of informational text is this?

How do you know when a chemical reaction has occurred

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?

Draw the aromatic compound toluene (methylbenzene). show all hydrogen atoms, including those on the ring.