Classify each of the following substances as an acid or a base according to the Arrenius Definition: HNO3 (aq)
KOH (aq)
Ca(OH)2 (aq)
HCl (aq)
NaOH (aq)

Classify each of the following substances as an acid, a base, or amphoteric substance according to the Bronsted-Lowry Definition:

a.) NH4+

b.) H3O+

c.) H2SO4

d.) H2O

What does a complete balanced chemical equation include? a. exothermic coefficients b. endothermic coefficients c. valence electrons d. molar coefficients

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.

Use the measurements in the table to determine which unidentified metal has the highest density. metal volume mass a 10.5 cm3 122 g b 14.2 cm3 132 g c 16.1 cm3 115 g d 12.7 cm3 126 g