Which of the following aqueous solutions will form a precipitate when combined with aqueous ammonium sulfide?

It is important to wear proper protective equipment in lab even when not actively performing experiments because accidents can affect any researcher, even one not working on an experiment. select the best answer from the choices provided

Voltaic cells produce a positive overall charge. what does this indicate? a. the reaction is likely to be endothermic. b. the reaction is spontaneous. c. the reaction is not likely to occur. d. the reaction is not spontaneous.

If 22.5 liters of oxygen reacted with excess of hydrogen, how many liters of water vapor could be produced?