How to calculate the average atomic mass of silcon

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)

Word equation for k+ h2o yield koh + h2

In the space, show a correct numerical setup for calculating the number of moles of co2 present in 11 grams of co2