What would be the pressure, in torr, exerted by 0.0718 moles of gas with a volume of 12.75 liters and at a temperature of 17°C?

Stage in which a star’s outer layers have started to cool and grow outward?

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?

One similarity and one difference between an element and a mixture of elements