The pit does not have any magical properties. What turns the guac brown is the air. If you can keep air from touching the guac then it will stay green. The pit will keep a portion away from the air, but what is more affective is to put plastic wrap over it and push it right down onto the surface.
Denuded skin is just another way of saying that the top layer (epidermis) of skin is gone...either from friction (abrasion or tear), trauma (tape burns), or severe rashes, or from a stage II pressure ulcer.
The gas evolved from the reaction is collected by attaching one end of a hose to the reaction container and inserting the other up into the inverted gas collection bottle. As the gas is created, it will displace water from the bottle.The volume of gas can be determined by the amount of water that was displaced by the gas. The volume of gas collected and the gas laws can be used to calculate the number of moles of gas collected.his equation can be used to calculate the pressure of the gas collected. Once the pressure of the collected gas is known, the number of moles of gas can be calculated using the ideal gas law: PV= nRT. Where: 1  P = Pressure of the gas. 2  V = Volume of water displaced. 3  n = number of moles of gas. 4  R = the ideal gas constant.