Which of the following is a reason for cell division? Repair of damage to an organism
to get smaller
to make fewer cells
for homeostasis

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?

Which of the following substances is the most soluble in water? a. sodium chloride b. methane c. bromine d. carbon

Stoichiometry- i need with 14 and 15! an explanation would be appreciated!