Is the following chemical equation balanced?

4Al + 3O2 2Al2O3

yes
no

Adepositional also feature that forms where a stream enters a lake or an ocean is a

The empirical formula of a compound is ch2o and its mass is 120 amu/molecule, what is its formula?

You are attempting to recrystallize a crude product mixture. you add the appropriate amount of hot solvent and are allowing the solution to slowly cool to room temperature. however, at room temperature no crystals have appeared, which of the following methods should be used to induce crystallization? choose all correct answers. a) place the flask in an ice bath. b) swirl the contents of the flask. c) add a small seed crystal of the desired product. d) scratch the inside of the glassware using a stir rod. it can be multiple choices