While conducting a lab experiment, ali calculated that 1.20 e6 joules of heat were needed to melt of 18.5 kilograms of an unknown substance at its melting point. what is the latent heat of fusion of the substance?

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