The specific heat of water and steam (water vapor) are 4.18 J/g C and 2.10 J/g C respectively. Heating a 74.0 g sample of water from 88.3 C to water vapor at 112.5 C requires 172.58 kJ of heat. Calculate the heat of vaporization of water in kJ/g. Assume the boiling point of water is 100 C

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?

What type of electromagnetic waves does the human eye see as the colors red blue or green a visible light waves b radio waves c infrared waves d microwaves

Once similarity and one difference between a mixture of elements and a mixture of compounds