What is the number of Joules needed to change 40.0 grams of water at 100°C to steam at the same temperature and pressure?
1.13,360 J
2.90,400 J
3.167.2 J
4.16,720 J

sodium (na), for example, has one electron in its valence shell. this is an unstable state because that valence shell needs eight electrons to be full. in order to fill its valence shell, find a way to add seven electrons to its valence shell

d.) the average kinetic energy of the gas particles is greater in container b because its particles move faster.

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.

it would be d. henry moseley

hope this !

and sorry if i'm late. have a good rest of your day! : d