Copper carbonate

8. How do the designers of fireworks make the explosions have different colours? Fireworks makers include different mixtures of metal salts in the exploding shell of a firework. Compounds are usually barium nitrate, strontium carbonate or nitrate, sodium oxalate, and copper

| A6Pink precipitate | A7Blue precipitate | Copper (II) Nitrate | B1Cloudy blue precipitate | B2Gold precipitate | B3NR | B4NR | B5Cloudy blue precipitate | B6Cloudy blue precipitate | B7Cloudy blue precipitate | Iron (III) Nitrate | C1Cloudy yellow precipitate | C2Brown precipitate | C3NR | C4NR

Amethyst is purple quartz; the color is caused by iron (Fe4+) impurities. Azurite is a copper mineral. Calcite is a very common and widespread mineral and has highly variable forms and colors. Lodestone is a natural magnet. Mica is a sheet silicate. Rose quartz is translucent and a variety of the silica mineral quartz, found in pegmatite. Talc almost always found in foliated masses in metamorphic rocks with many carbonate minerals. Pyrite is a very common mineral. The brassy-yellow metallic color of pyrite

Finger-marks are known as a small print that can be left on any surface, each finger-mark is unique to an individual. There are multiple types of finger-marks the three main ones are known as a Whorl, Arch and Loops. The finger-marks are always photographed before being collected at a crime scene, there are several different types of techniques that are used to be able to lift the prints. There are hinge lifts, rubber lifts and cellophane tape. Hinge lift can be used using multiple different colours

Abstract Pollutants are impacting aquatic organisms disposed by daily human activities and natural occurrences. An extensive amount of pollutants such as pesticides, heavy metals, and hydrocarbons can result in direct significant damage, e.g. death. However lower levels of these harmful substances can be stored in an organism and increase as it continues and follows up the food chain, a process called biomagnification or bioaccumulation, having the greatest effect on the top predator of that food

that the compound was soluble in water, this helped us to eliminate the possible presence of the poorly soluble salts (Cooper, 2008). However, tests for these anions were still performed. The compound was tested for the presence of ammonium, carbonate, sulfate, chloride, and nitrate, as seen in Table 2. The nitrate test produced a precipitate, indicating the presence of the nitrate ion in the compound. At this point it was hypothesized that our unknown compound was calcium nitrate. In order

metal. There are some non metal alloys components such as the various forms Hydroxides and Carbonates. The most important metallic component of an alloy is called a main metal, parent metal and the base metal. The other component of an alloy can be either metal or nonmetal. Although alloys can be a compound, they are usually a solid solution. Both, the first uncombined and metal, Gold was is used for fashion. Copper being the next uncombined element was used for tools and weapons.

compound, (La0.8Ca0.2) (Cr0.9-xCo0.1Fex) O3 (x=0.03, 0.06, 0.09, 0.12) was synthesized by mixing the powders of lanthanum oxide (La2O3, 99.99%), chromium oxide (Cr2O3, 99.99%), cobalt oxide (Co3O4, 99.99%), ferric oxide (Fe2O3, 99.99%) and calcium carbonate (CaCO¬3, 99.99%) in stoichiometric ratio according to the following equation. 0.4La2O3 + 0.2CaCO3 + ((0.9-x))/2Cr2O3 + 0.1/3Co3O4 + x/2Fe2O3 → (La0.8Ca0.2)(Cr0.9-xCo0.1Fex)O3 +CO2 ↑ …… (1.2) The appropriate quantities of starting materials

Water Assignment: Part 2 1: What is acid rain? What type of chemical reactions are involved in it’s production? Why is acid rain harmful to the environment. Acid rain is any form of precipitation with acidic components such as sulfuric or nitric acid that fall to the ground from the atmosphere in wet and dry forms. Acid rain is a result of when sulfur dioxide and nitrogen oxides are emitted into the atmosphere and are transported by wind and air currents. (What is Acid Rain? (2017, March 01).

Helping Historic Buildings to Weather Modernity For several decades, USPS Fort Worth was subjected to an elevated portion of Interstate Highway I-30 constructed parallel to the building’s Lancaster Street frontage. This portion of the highway was eventually demolished and relocated to an area one block south of the site. By then, the damage to the post office was already done—and extensive. Carbon staining, usually dark brown, gray or black, is a typical result of repeated exposure to automobile