The two most common are red phosphorous and white phosphorous. Problem #3: At 100.0 °C and 120.0 torr, the mass density of phosphorus vapor is 0.6388 kg/m 3.What is the molecular formula of phosphorus under these conditions? COVID-19 is an emerging, rapidly evolving situation. I'm doing a problem set for Chemistry II involving Lewis Structures. I'm pretty sure this isn't correct though. Phosphorus is a nonmetal, solid at room temperature, and a poor conductor of heat and electricity. White phosphorus causes severely painful, partial (second degree) to full thickness (third degree) burns, which have a characteristic yellow color and garlic-like odor. Chemically, white phosphorus is more reactive than red phosphorus; It is polymeric and consists of chains of P 4 tetrahedra linked together as shown in the figure given below; Black Phosphorus properties: α-black and β-black are two forms of black phosphorus. Apparently each P is connected to three other Phosphorus atoms. Reason Red phosphorus contains tetrahedral units linked to one another to form linear chains. When red phosphorus is heated in a sealed tube at 803K, an α-black form is formed. I'm supposed to draw the lewis structure for P4. Solution: 1) Convert density to g/L: 0.6388 kg/m 3 = 638.8 g/m 3. The chemical symbol for white phosphorus is P; the vapor has the formula P 4 and the molecular weight is 124.0 g/mol. Smoke may be released from the burn site from the continued burning of white phosphorus or the formation of phosphoric acid. Since 1 m 3 = 1 x 10 3 dm 3. d = 638.8 / 1 x 10 3 = 0.6388 g / dm 3. Elemental phosphorous comes in a variety of forms, called allotropes. I'm not sure how to draw it. 2) Use a rearrangement of PV = nRT to solve for the molar mass: * Breast milk, formula, and food should be the only sources of phosphorus for infants. According to one analysis of data on healthy U.S. adults using NHANES III data collected in 1988–1994, high phosphorus intakes (1,000 mg/day or more) were associated with increased rates of all-cause and cardiovascular mortality in adults through 2006 [ 65 ]. White phosphorus is manufactured industrially by heating phosphate rock in the presence of carbon and silica in a furnace. White Phosphorus is a translucent white solid , is poisonous and insoluble in water. MEDIUM. (2,4) Conversion Factors: Red phosphorus is harmless but the white form is highly toxic and reacts violently with oxygen, so … (2) White phosphorus has a garlic-like odor. Phosphorus comes in two forms, red and white. Right now I have P /// :P:P:P: with lone pairs also on the P's at the bottom of my structure. The key difference between red and white phosphorus is that the red phosphorus appears as dark red colored crystals whereas the white phosphorus exists as a translucent waxy solid that quickly becomes yellow when exposed to light.. Phosphorus is a chemical element that occurs in several different allotropes.The most common allotropes are red and white forms, and these are solid … Phosphorus occurs in at least 10 allotropic forms, the most common (and reactive) of which is so-called white (or yellow) phosphorus which looks like a … , It is less stable and hence , more reactive. This produces phosphorus as a vapour, which is then collected under water. View Answer. Red phosphorus is made by gently heating white phosphorus to about 250°C in the absence of air. Phosphorus | P | CID 5462309 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more. 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