PLEASE HELP ASAP

The primary source of nitrogen for the proteins in our body tissues is nitrogen:

A released as a gas by volcanoes.

B found in plant and animal proteins we eat.

C released by dead and decaying organisms into the air.

D absorbed directly from the air

What woukd most likely be the transmittance at a 0.70 m solution of solute a? a) 7.6%b) 1.1%c)4.0%d)4.6%

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.

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