Balance this equation. If a coefficient of "1" is required, choose "blank" for that box. CH 4 + ___ O 2 → CO 2 + H 2 O

The electromagnetic force acts between what

Which metal exist in liquid state and can be cut with knife ?

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?