Consider the chemical equation.

2nbr3 + 3naoh --> n2 + 3nabr + 3hobr

if there are 40 mol of nbr3 and 48 mol of naoh, what is the excess reactant?

n2
nbr3
naoh
hobr

Compare and contrast physical changes with chemical changes.

How have the greenhouse gasses increased from the year 2000 to 2018

The small bags of silica gel you often see in a new shoe box are placed there to control humidity. despite its name, silica gel is a solid. it is a chemically inert, highly porous, amorphous form of sio2. because water vapor readily adsorbs onto the surface of silica gel, it acts as a desiccant. despite not knowing mechanistic details of the adsorption of water onto silica gel, from the information provided you should be able to make an educated guess about the thermodynamic characteristics of the process. predict the signs for δg, δh, and δs for the adsorption of water.