Which statements are part of the safety protocol for this lab experiment?

An occluded front moves over the farmland that has been experiencing drought conditions. what change in weather will this front likely bring? a. gray skies, but no rain b. an extended period of rain c. more dry air and sunny skies d. violent, short-lived thunderstorms

What are the first three quantum numbers for the electrons located in subshell 2s?

How many moles of al3+ ions are in 1.25 moles of al2o3