chemicalDefinition from Wiktionary, the free dictionary Jump to: navigation, searchFrom Wiktionary under the GNU Free Documentation License. In chemistry, a chemical substance is a material with a specific chemical composition. A common example of a chemical substance is pure water; it has the same properties and the same ratio of hydrogen to oxygen whether it is isolated from a river or made in a laboratory. Some typical chemical substances are diamond, gold, salt (sodium chloride) and sugar (sucrose). Generally, chemical substances exist as a solid, liquid, gas, or plasma and may change between these phases of matter with changes in temperature or pressure. Chemical reactions convert one chemical substance into another. Forms of energy, such as light and heat, are not considered to be matter, and thus they are not "substances" in this regard. From Wikipedia under the
GNU Free Documentation License What is a chemical assistant? What are the requirements for being a chemical assistant? Q. Describe equipment used on the job as a chemical assistant, identify what type of degrees, skills, course work, or training is required to be a chemical assistant. Asked by struggling student - Sun Sep 3 21:26:03 2006 - - 1 Answers - 0 Comments A. Chemical Lab Technician Back to search Contact Information: Manpower Professional 3075 Governors Place Blvd. Suite Dayton, OH 45409 Job Reference: PR45409_NT_040KSA174 View other jobs with this company Contact: Phone: Fax: Professional Recruiter 937-643-7467 Apply Online | Email this job | Save this job Job Description: Chemical Lab Tech with experience in the rubber industry. Prefer experience in Research and Development of compounds and processes involved with vulcanizing, testing, molding, and recycling of rubber products. Chemical laboratory assistant Tasks You work in the chemical lab in our research and development division, where you perform jobs in quality control and failure analysis. You carry out… [cont.] Answered by amanda c - Mon Sep 4 14:03:23 2006 What are the chemical equations for the following acids and bases? Q. Write chemical equations for the reactions between sodium hydroxide and the acids 1. Hydrochloric acid (HCl) 2.Acetic Acid ( CH3COOH) 3. Phenol ( C6H5OH) likewise write chemical equations for the reactions between NITRIC acid and bases: 1.Sodium hydroxide (NaOH) 2.Ammonia (NH3) It would be much appreciated! Asked by Sukhy - Sun Oct 18 12:05:15 2009 - - 1 Answers - 0 Comments A. NaOH + HCl = NaCl + H2O CH3COOH + NaOH = CH3COONa + H2O NaOH + C6H5OH = sodium phenoxide + H2O HNO3 + NaOH = NaNO3 + H2O NH3 in solution produces the base NH4OH HNO3 + NH4OH = NH4NO3 + H2O Answered by Ak - Sun Oct 18 12:26:04 2009 What chemical causes dementia in patients with end stage liver disease?
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