Batteries are made of two metals with different electron affinities. what does the phrase “electron affinity” mean and how does this affinity affect the voltage of the battery?

Identify the arrows that show the correct direction of heat transfer. 66°f 112°f 98°f

Calculate the mass of an object that has a momentum of 100kg x m/sec and velocity of 4 m/sec

The experiment was repeated many years later but the gases were mixed in a different type of container. a white solid was obtained which was xenon fluoride. predict whether you think 1) krypton and 2) radon will react with fluorine. explain reasons for your predictions