A chemical reaction in which all of the reactants and products are gases takes place in a closed system. How would the chemical equation for that reaction be described? The mass of the product gases is equal to the mass of the reactant gases.

The mass of the product gases is greater than the mass of the reactant gases.

The mass of the reactant and product gases will vary with the temperature.

The mass of the reactant gases is greater than the mass of the product gases.

What type of reaction is shown below? check all that apply. 2h2o2 → 2h2o + o2 synthesis decomposition combustion

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.

You wish to prepare a buffer consisting of acetic acid and sodium acetate with a total acetic acetate plus acetate concentration of 250 mm and a ph of 5. what concentrations of acetic acid and sodium acetate should you use