In real isotopes, should the atoms of the same isotope differ in mass?

One way that radioactive waste is treated is by burying it in repositories. the repositories are found only in states with very low populations. true or false? a. trueb. false(also i meant to put high school but it put down middle school instead)

How do you lengthen a pattern piece? (family and consumer science, sewing)

How many moles of potassium hydroxide are needed to completely react with 2.94 moles of aluminum sulfate