.... Balance. 1 x Weighing Bottle. 10 grams of Sodium Hydrogencarbonate. 10 grams of Sodium Carbonate. A bottle of 2 molar HCL. Diagram. Method. Three grams of sodium hydrogen carbonate was weighted out accurately using a weighting bottle and a balance. Then thirty centimetres cubed of 2 molar HCL was measured using a measuring cylinder. The acid was then placed into the polystyrene cup and its temperature was taken and recorded using the thermometer. The pre-weighted sodium hydrogencarbonate was then added to the solution, and the final temperature was recorded. The contents of the cup were then emptied out and the cup was washed out with water and then thoroughly dried. ....

.... people. Inhalant use is intentionally breathing in a vapor of gas with the purpose of reaching a high. Inhalants are legal everyday product, which have a useful purpose. Some of these substance are paint, glues, white out, air conditioning refrigerant, felt tip makers, spray paint, air freshener, butane and even cooking spray. Inhalants can really harm the body. Almost all inhalants can cause the body to slow down. The user can suffer Sudden Sniffing Death Syndrome this means that the user can die the first time he or she uses an inhalant. Inherits can effect the other part of the body like the heart, liver, kidney, brain, bone marrow and many other organs. Inhalants ....

.... DDT was banned in 1972 and was found accumulating in the food chain. The use of lead in gasoline was phased out in '73 which caused lead levels to drop 98%. In '74 the agency required drinking water to be physically and chemically treated. CFCs were banned in '78 and a nation-wide toxic waste site cleanup program was developed in 1980. The EPA then evacuated Times Beach, Montana for dangerous levels of dioxin in soil, which was then criticized for its heavyhandedness and arrogance. Charges of mismanagement and undue political influence caused the head of the EPA to resign in '83. "The deputy director resigns because of charges of making a 'hit list' of employees to ....

.... for complementary nucleotides to bind. Hence, it is the site where the synthesis of a new complementary strand will be formed. Because of the DNA “unzipping”, there will be two single strands of DNA. Hence, because there is two single strands of DNA, there will be two new daughter strands synthesized. However, each of these daughter cells is synthesized in different ways. The first strand of DNA is built by simply adding nucleotides to its end. This strand grows inward towards the replication fork as the DNA molecule unzips. This strand ends with a hydroxide (OH) group and is called the 3` prime or 3`end. The enzyme that catalyzes this process is called DNA polym ....

.... increased activity, decreased appetite, and a general sense of well being, which can last 6 to 8 hours. After the initial rush, there is typically a state of high agitation that in some individuals can lead to violent behavior. Contrary to the stereotype of rural areas as idyllic, protected environments in which to raise families, substance abuse is as great a problem as it is in the cities. One must realize that rural communities vary in characteristics considerably, which complicates our understanding of rural substance use problems and increases the need for prevention, intervention, and treatment programs. For too long, the problems of alcohol and drug abuse in ....

.... in the continuous phase to produce a semisolid material such as a jelly. For example, a warm, dilute(2 percent) solution of gelatin(a protein mixture) forms, on cooling, a stiff gel in which the molecules of the continuous phase are trapped in the holes of a "brush-heap" like structure of the gelatin. Administered orally. Microemulsion: Microemulsions are thermodynamically stable, optically transparent, isotropic mixtures of a biphasic oil-water system stabilized with surfactants. The diameter of droplets in a microemulsion may be in the range of 100 A to 1000 A. Microemulsion may be formed spontaneously by agitating the oil and water phases with carefully selec ....

.... 8 inch drives costing tens of thousands of dollars each buzzed away in the air conditioned isolation of corporate data centers. The personal computer revolution in the early 1980s changed all that, ushering in the introduction of the first small hard disk drives. The first 5.25-inch hard disk drives packed 5 to 10 MB of storage, the equivalent of 2,500 to 5,000 pages of double-spaced typed information, into a device the size of a small shoebox. At the time, a storage capacity of 10 MB was considered too large for a so-called "personal" computer. The first PCs used removable floppy disks as storage devices almost exclusively. The term "floppy" accurately fit the earliest 8-in ....

.... an Arabic name. Modern astronomers designate the bright stars according to the CONSTELLATIONS they are in. Thus, the brightest star in the Big Dipper (part of the constellation Ursa Major) is called alpha Ursa Majoris. Polaris, in the Little Dipper (Ursa Minor), is gamma (designated by the Greek lower-case letter gamma) Ursa Minoris, and Betelgeuse, in Orion, is gamma Orionis. VARIABLE STARS (those which periodically change in brightness) have lettered names, such as RR Lyrae in the constellation Lyra. Fainter stars are known by their numbers in a catalog; HD 12938 is the 12,938th star in the Henry Draper Catalogue. CHARACTERISTICS OF STARS Each star in the universe h ....