Chemical Oxygen Demand (COD)Introduction:The Chemical Oxygen Demand (COD) test is the standard method for measuring the amount of pollution in a sample that is unable to be oxidised biologically.Oxidation takes place on both the organic and inorganic component but as the organic component is more dominant‚ it is of more significant interest.In the COD test‚ the amount of oxidation that takes place depends on sample COD concentration‚ digestion time
Premium Sewage treatment Water pollution Sulfur
Chemical Warfare Diyora Shukurova Period 1 06-05-2014 Chemical warfare is known as the “use of toxic chemicals in battle.” Chemicals have been used for battle throughout centuries. But also known as any toxic chemical which is deadly or can cause injuries. For example‚ poisoned arrows‚ boiling tar‚ arsenic smoke and noxious fumes‚ and there are many more. Chemical weapons were first used in 1915. The germen military was the first to release 168 tons of chlorine gas at Ypres and Belgium which caused
Premium Chlorine World War I World War II
1. You don’t have to be a chem whiz * Chemical engineering requires a basic understanding of chemistry‚ physics‚ math. You’re not required to memorize formulas‚ it’s more important to understand the principles and learn how to apply them to solve a problem/improve status quo. However after a few semesters‚ your brain WILLremember many formulas! * You do need to be analytical and have the ability to think critically. You must be able to look at the problem from a bigger viewpoint but
Premium Engineering Chemical engineering Engineer
he terms “chemical accident” or “chemical incident” refer to an event resulting in the release of a substance or substances hazardous to human health and/or the environment in the short or long term. Such events include fires‚ explosions‚ leakages or releases of toxic or hazardous materials that can cause people illness‚ injury‚ disability or death. While chemical accidents may occur whenever toxic materials are stored‚ transported or used‚ the most severe accidents are industrial accidents‚ involving
Premium Bhopal disaster Safety Bhopal
Chemical Reactions Chemical Change • reorganization • original substances form new substances with different formulas • may or may not involve a change of state • symbols used to describe chemical reaction are known as a chemical equation • Chemical equations do not have equal signs (=) they have an arrow Chemical Equations • Must follow the Law of Conservation of Matter • atoms can neither be created or destroyed during a chemical reaction • What
Free Chemical reaction Hydrogen Chemistry
Ukraine in the modern globalization processes Бурдяк Віра Іванівна (Vira Burdyak) д.політ.н.‚ професор Чернівецького національного університету ім. Ю.Федьковича Author points out that globalization‚ which has enclosed the overwhelming majority of states in the modern world including also Ukraine‚ is one of the most important causes of civilization development. It is especially accentuated that under the influence of global and local factors new geopolitical economic and civilization situation
Free Globalization Multinational corporation Corporation
Chemical Description Chemical Description Chemical #1 Seashell Calcium Carbonate - CaO3 Density | * 2.71 g/cm3 (calcite) * 2.83 g/cm3 (aragonite) | Exact mass | * 100.0869 g/mol | Molecular Formula | * CaO3 | Melting point | * 825 °C (calcite) * 1339 °C (aragonite) | Boiling point | * Decomposes | Acidity | * 9.0 | Flash point | * Non flammable | Crystal structure | * Trigonal | Other names | * Limestone‚ Marble‚ Chalk‚ Calcite and
Premium Oxygen Water
Example Company Balance Sheet December 31‚ 2011 ASSETS LIABILITIES Current Assets Current Liabilities Cash $ 2‚100 Notes Payable $ 5‚000 Petty Cash 100 Accounts Payable 35‚900 Temporary Investments 10‚000 Wages Payable 8‚500 Accounts Receivable - net 40‚500 Interest Payable 2‚900 Inventory 31‚000 Taxes Payable 6‚100 Supplies 3‚800 Warranty Liability 1‚100 Prepaid Insurance 1‚500 Unearned Revenues 1‚500 Total Current
Premium Balance sheet Generally Accepted Accounting Principles Asset
Title: Daily Exercise. Topic: Exercise Habit. Thesis statement: Daily exercise causes life to improve. (Persuade) Type of essay: Cause and Effect. Technique: Dramatic Entrance. Effects: 1. Cardiovascular and pulmonary function. 2. Helps reduce the stress. 3. Improve of emotional fitness. Target: Young adults. Method: two By 2006‚ a study by the Centers for Disease Control and Prevention (CDC) found that 28.5 percent of Americans between the ages of 20 and 39 were obese
Premium Heart Circulatory System Obesity
sure rooms are convenient‚ and that each day of the event runs smoothly according to the agenda. Attendees * Coming to the event‚ understanding the purpose of the event‚ and possibly providing feedback Agenda Day 1 Registration: 8:30am-9:30am Breakfast: 8:40am-9:30am Plenary Session: 9:30am- 11:00am Coffee Break: 11:00am-11:15am Breakout Session: 11:15am-12:15am Workshop Session 1 : 11:15am- 12:15pm Presentation 12:15pm- 1:30pm Lunch 1:30pm - 2:30pm Concurrent Session: 2:30pm-3:30pm
Premium Dinner The Agenda Event planning