Is white phosphorus ignites easily chemical or physical?

How many molecules in a one inch square column of air? What do scientist that study ecosystems study in the area? What is the mole of the concentration of KBr in a solution prepared by dissolving 2.21g of KBr in 897g of water? What are the properties of reactivity? Do water worn rocks look shiny when dry? What kind of diseases can affect the growth of pea plants? Where does most water occur? What is the type of unconformity in which an erosional surface exists in one of several horizontal layers? What state borders Washington dc and Potomac river? Not a mixture or a solution? Is syrup more dense than oil? What does wind and water do to land? What organelle is primarily responsible in the synthesis of long chains of amino acids? Why aren't properties affected by changes in temperature and pressure? What is solution that has only a little solute? What does the word 'synergize' means? What is the number of protons and electrons of berrylium? How are the problems of boiling over and scum formation related? End product of the aerobic catabolism of glucose? Do fish have a constant body temperature?