When a system is at equilibrium states: (A) the concentration of reactants and products becomes equal
(B) the opposing reactions (forward and reverse) stop
(C) the rate of the reverse reaction becomes very low
(D) the rates of the forward and reverse reactions become equal​

2pos suppose an object in free fall is dropped from a building. its starting velocity is 0 m/s. ignoring the effects of air resistance, what is the speed (in m/s) of the object after falling 3 seconds? give your answer as a positive decimal without units. answer here

In a reaction (at equilibrium) that makes more moles of gas than it consumes, what is the effect of increasing the pressure?

If you chip a tooth, most likely you will go to the dentist to have the missing material filled in. currently the material used to fill in teeth is a polymer that is flexible when put in, yet is hardened to the strength of a tooth after irradiation with blue light at a wavelength of 461 nm. what is the energy in joules for a photon of light at this wavelength?