2.998x10^8 m/s is how many kilometers per hour?

Need in all of themmm only answer if you know plsssss

Diamond will scratch quartz. true or false

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