countless children ran away from home life and roamed the city street‚ street children uses glue (H.B Fuller) by sniffing them (glue addicted) as the way to get-away from their real life condition. The misuse one of the adhesives‚ Resistol‚ a toluene base glue‚ by the street children of America‚ where the social economic was taking part of this situation. For years H.B Fuller had been pressure by child advocate groups in Central America and the United States‚ and encouraged the company to minute
Premium Central America North America Americas
a few crystals of Naphthalene to 3 clean‚ dry test tubes. 2. Add 2-3 mL water to test tube #1‚ 2-3 mL cyclohexane to test tube #2‚ and 2-3 mL of ethyl alcohol to test tube #3. 3. Stir each test tube with separate mixing rods. 4. Record the results. S for soluble‚ SP for sparingly soluble and I for insoluble. 5. Repeat this experiment using the same 3 solvent: water‚ cyclohexane‚ and ethyl alcohol with the unknown solid and unknown liquid. 6. Record the results (refer to #4)
Premium Chemistry Chemical reaction Chemical substance
NORTHERN CARIBBEAN UNIVERSITY DEPARTMENT OF BIOLOGY‚ CHEMISTRY and ENVIRONMENTAL SCIENCE LABORATORY MANUAL Instructor: Dr. M. Wilson CHEM401: BIOCHEMISTRY for NURSES Prepared by: Oreane Collins CHEMISTRY LABORATORY REGULATIONS AND SAFETY PRECAUTIONS Reference: http://www.sciencebyjones.com/safety_rules.htm Thanks to the Flinn Scientific Safety Rules for much of the below. General Guidelines 1. Conduct yourself in a responsible manner at all times
Premium Organic chemistry Carbon Alkene
EFFECTS OF VOLATILE ORGANIC COMPOUNDS (10244818) Volatile organic compounds (VOCs) are organic chemical compounds that have high enough vapor pressures under normal conditions to significantly vaporize and enter the atmosphere. According to EPA ’s Terms of the Environment‚ a volatile organic compound is "any organic compound that participates in atmospheric photochemical reactions except those designated by EPA as having negligible photochemical reactivity." VOC can also stand for the term “volatile
Premium Ozone Volatile organic compound Smog
SKPP 1313 Fundamentals of Petroleum Engineering Quiz 1 (20 marks) Name: _____________________________________________________ Answer all questions 1) Petroleum engineer can be divided into several groups. Name one of them and briefly explain his main duty. [3 marks] __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ __________________________________________________________________
Premium Igneous rock Sedimentary rock Rock
SYNTHETIC EXPLOITATION OF ENZYMES: BIOCATALYSIS IN ORGANIC SOLVENTS: FUNDAMENTALS ENZYMES IN ORGANIC SYNTHESIS 1. Enzymes catalyze a broad spectrum of reactions with high turnover numbers. Rate enhancements approach 1012 fold. 2. Enzymes may accept a wide range of substrates. 3. Enzymes are highly regio and stereoselective. 4. Enzyme reactions take place under mild conditions; this minimizes problems of isomerization and racemization. 5. Enzymatic processes are less hazardous and polluting
Premium Solvent Enzyme Acetic acid
CHE656 Computer Applications for Chemical Engineering Practice Process Simulation with ASPEN PLUS Exercise Problems Version 2012 Prepared by Dr. Hong-ming Ku King Mongkut’s University of Technology Thonburi Chemical Engineering Department Chemical Engineering Practice School © May 2004-2012 – Use with Permission of the Author Only 1 Section 1 Elementary Modules‚ Mass Balances‚ and Degree of Freedom Analysis 2 1. Mass Balances and Constraints with Elementary Modules
Premium Chemical engineering Benzene Chemical reaction
Pre-lab Properties: Propanol‚ butanol‚ methanol Purpose: To separate two alcohols by distillation and analyze results with GC. Do not plug mantle directly into electrical outlet‚ use controller! Use 40/60 mol percent propanol/butanol (no cyclohexane or toluene are used in this lab because they are more toxic) Set up fractional distillation Set heat at highest level to start‚ then turn back down to 60-80% when vapor starts up column‚ collect first sample then adjust heat as needed Not too fast
Premium Distillation Ethanol
Analysis of Hydrocarbons Jessa Grace B. Castillo* and Stephanie Chua Department of Chemistry‚ University of Santo Tomas‚ Manila‚ Philippines ______________________________________________ Hydrocarbons are organic compounds containing only hydrogen and carbons and further divided in major types. Hydrocarbons react differently in reagents. The basis of determining an unknown hydrocarbon is due to the differences in reactions of hydrocarbons. An unknown compound is determined using tests.
Premium Benzene Carbon Hydrocarbon
Rgt/Pdt | Structure | Physical Properties | Hazards | acetone | | Physical State: LiquidAppearance: colorlessBoiling Point: 56.20CMelting Point: -95.30CDensity: 0.79 g/cm3 | Causes eye and skin irritation. May cause central nervous system depression. May cause liver and kidney damage. Causes respiratory tract irritation. Extremely flammable. | aniline | | Physical State: LiquidAppearance: oily - colorlessBoiling Point: 1840CMelting Point: -60CDensity: 1.0216 g/cm3 | Combustible. Hazardous in
Premium Respiratory system Inflammation Acetic acid