# state

1. ### Help determining state of products

Hey all- I'm working on some problems about writing out and balancing chemical equations. I think I understand it pretty well except for determining the physical state of the products. Here's the specific problem I'm stuck on: solutions of barium chloride and potassium carbonate react to form a...
2. ### Final state of Hydrogen atom?

A ground state hydrogen atom absorbs a photon of light having a wavelength of 92.27 nm. It then gives off a photon having a wavelength of 383.4 nm. What is the final state of the hydrogen atom? Values for physical constants can be found here.
3. ### Finding oxidation state of metal center?

what is the oxidation state of the metal center in of [Cr(CN)ClF2(NH3)2]- Could anyone explain how exactly to know the charges of each component? I think the charge of (NH3)2 is -2 but Im not sure how to find the rest of the charges. Thanks for any insight.
4. ### Changes in Potential and Kinetic Energy During Changes of State

Im kinda confused about the change in kinetic and potential energy during changes of state. For example, when gas turns into liquid, kinetic energy stays constant, but why does potential energy decrease? Shouldn't it go up since the molecules are closer and tighter together? Also, when a liquid...
5. ### Transition State Theory

Hello, In regards to the kinetics, I understand that a one step mechanism involving a termolecular elementary reaction is unlikely to occur b/c of the need for all three reactants to successfully collide with enough energy to surpasses the activation energy (where the kinetic energy of the...
6. ### First Excited State electron configuration

What is the core notation for the first excited state of Argon? I got[Ne] 3s1 3p6 41, but the answer says [Ne] 3s2 3p5 4s1. How come they don't take the electron from 3s1, not 3p5? Thanks!