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Describe in details the twelve-basic principle of Green Chemistry.
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- Write the chemical equation for the solution of calcium hydroxide in water.(A) if both sentences are true, (B) if both sentences are false, (C) if the first sentence is true but the second is false, and (D) if the first sentence is false but the second is true. 1. Water appears in nature in all three common states of matter. Water is a tasteless, odorless liquid at standard temperature and pressure. 2. The addition of salt in the distilling mixture made the water impure and saline. The addition of 5 drops of the silver nitrate solution into the distillate determines whether the distillate is impure or pure water. 3. The ideal electrical conductivity of totally pure water is 0.055 microSiemens, whereas typical deionized water has an electrical conductivity of 0.1 microSiemens. The freezing point of water at 1 atm is 100degC. 4. From the air, oxygen can slowly diffuse across the water’s surface from the surrounding atmosphere, or be mixed in quickly through aeration, whether natural or man-made. The aeration of water can be caused by wind (creating waves),…Physical chemistry should be studied by students in chemical engineering because * It applies thermodynamic analysis It is a requirement in the curriculum It deals with experimental observations It is concerned with physical properties and structure of matter
- How should the mercury bulb of the thermometer be placed in the distillation apparatus? Why is the placement of the thermometer is important during distillation?Imagine that you have 4 buckets full of dark, muddy water. One bucket is frozen, one bucket is boiled, one bucket is shaken up, and one bucket is passed thru a paper filter. Which bucket is most likely to become lighter in color?Define the following, and give a specific example of each.
- (A) if both sentences are true,(B) if both sentences are false,(C) if the first sentence is true but the second is false, and(D) if the first sentence is false but the second is true. 1. Phenolphthalein is a weak acid that is naturally pink. Rheology is the science that deals with the flow of fluids and the deformation of solids. 2. In the experiment on the rusting of metals, the ferricyanide’s blue coloration is an indication that no chemical reaction occurred after its use. Prussian blue is the color produced by the reaction of ferricyanide with the phenolphthalein. 3. When steel is continuously and consistently exposed to air, oxygen, and water, aluminum oxides will be formed on its surface. In the Philippines’ old coins, the metal commonly found in all of the coin denominations is nickel. 4. Galvanized steel is steel coated with tin. A polymer is a type of metal. 5. Corrosion is the same as rusting, and these terms may be used to refer to the wearing away of all metals by the…Enrico Fermi (1901–1954) was a famous physicist who liked to pose what are now known as Fermi problems, in which several assumptions are made in order to make a seemingly impossible estimate. Probably the most famous example is the estimate of the number of piano tuners in Chicago using the approximate population of the city and assumptions about how many households have pianos, how often pianos need tuning, and how many hours a given tuner works in a year. Another famous example of a Fermi problem is "Caesar's last breath," which estimates that you, right now, are breathing some of the molecules exhaled by Julius Caesar just before he died. The assumptions made are: 1. The gas molecules from Caesar's last breath are now evenly dispersed in the atmosphere. 2. The atmosphere is 50 km thick, has an average temperature of 15 °C, and an average pressure of 0.20 atm. 3. The radius of the Earth is about 6400 km. 4. The volume of a single human breath is roughly 500 mL. Perform the…For this experiment, you used 0.25 g of sodium bicarbonate, which is a relatively small mass of solid. Identify the potential consequences of using a much larger mass of sodium bicarbonate. The flask could explode. The heat of the reaction might cause boiling. The reaction would not occur. The stopper of the flask could pop off. The temperature of the reaction would decrease significantly.
- PROFILE OF LEAD: PLEADE COMMENT IN SOME EXTEND THE PHYSICAL AND CHEMICAL PROPERTIES OF HEAVY METAL LEADSolid calcium chloride is formed by the reaction of chlorine gas and solid calcium . Write a balanced chemical equation for this reaction.write a balanced chemical equation for the formation of magnesium oxide from magnesium metal and oxygen gas (a diatomic molecule).