1 â¢Mathematically, the half life of a first-order reaction is: ln [A]t = !kt [A]0 So, for t = t1/2 and [A]t = Â½ [A]0 1 [ A] 0 ln 1 = ! kt 1 ln 2 = ! kt 1 2 2 [ A] 0 2 ln 1 2 0.693  t1 2 2  = ! = k k â¢Note that the half-life of a first-order reaction is independent of the initial concentration of the reactant.
Brie (/briË/ ; [bÊi]) is a soft cow's milk cheese named after Brie, the French region from which it originated (roughly corresponding to the modern departement dÃ©partement Of-seine-Et). Marne it is pale in color with a slight grayish tinge under a rind of white. moldhe curd is obtained by adding rennet to raw milk and warming it to a maximum temperature of 37 Â°C (99 Â°F). The cheese is then cast into molds, sometimes with a traditional perforated ladle called a pelle a Ã . Brie the 20 (cm 8) in mold is filled with several thin layers of cheese and drained for approximately 18. hours
Many people wonder how to eat Brie cheese. Brie is a soft cows' milk cheese that is named after the province in France in which it originated. It is made by adding rennet to raw milk, heating it to 98.6 degrees and then casting into molds, where it is drained for about 20 hours. Lay the puff pastry on a baking sheet and place the wheel of Brie on top. 2  Fold the pastry up over the cheese. 3  Gently squeeze together the pastry to seal and turn the cheese wheel over so that the sealed edge is on the bottom.