I think that the invention of the car changed completely the way of living of many people. At the beginning the cars were bought by few people because the cost was high and the most of world population was poor. Today this situation has totally changed: in the development countries all families have one car and a large number of them have two cars or more. Nowadays cars are essential: many people use them to go to work every day and to travel on holiday. I think cars are one of the most important
Premium Adolescence Automobile
CSEC CHEMISTRY NOTES ON SOLUBILITY OF COMPOUNDS IN WATER and SATURATED SOLUTION Reference: Chemistry‚ a Concise Revision Course for CXC by Anne Tindale From Chemistry for CSEC by Tania Chung-Harris and Mike Taylor Factors that influence solubility Temperature * The solubility of solids in liquids generally increases as temperature increases. * The solubility of gases in liquids generally decreases as temperature increases. (gases are less soluble in warm water than in cold water)
Premium Ammonia Solubility Chemistry
Darsh Patel Dr. Anthony Chem 101-L 20 March 2013 Indirect gravimetric determination of hydrate compound in a mixture Objective To determine the percent BaCL2*2H2O in sample of hydrated mixture. Materials: Aprons‚ goggles Gravimetric balance(electronic weighing scale) Crucible without cover Bunsen burner Lighter flint Iron Support stand Wire mat‚ glove Clay triangle Procedure: Step 1. Support a clean porcelain crucible and its cover on a clay triangle (see Figure 1). Heat them in
Premium
Exp. 2 Separation of Three Compounds by Extraction Introduction: The purpose of this experiment is do demonstrate the proper procedures of extraction and to develop a practical understanding of this method. In this experiment‚ extraction is used to separate a known acid‚ base‚ and neural compound from each other. The first two compounds undergo proton transfer reactions in the presence of acids or bases. Acids RCOOH‚ like benzoic acid‚ was deprotonated to form RCOO-. Bases RNH2‚ like ethyl 4-aminobenzoate
Premium Chemistry Acid
The following three pieces were all found in the book A World of Art by Henry M. Sayre. The three sculptures‚ Puppy‚ Cloud Gate‚ and Great Serpent Mound‚ where all selected because of their relevance to nature. Both Puppy and The Great Serpent Mound are almost literally made of natural material‚ particularly vegetation. On the other hand‚ Cloud Gate is made of stainless steal‚ but yet the steal reflects it’s surrounding. Particularly Could Gate reflects the sky above it‚ and thus incorporates nature
Premium Art Sculpture Aesthetics
tetrahedral complex of the type [MA2 B2] not show geometrical isomerism? 1 (3) How do you account for the miscibility of ethoxyethane with water. 1 (4) Give the IUPAC name of the organic compound 1 O II (CH3)2 C CH C CH3 = − − (5) Name the monomers of nylon 2 or nylon 6 ploymer. 1 (6) Give one example of an artificial sweetener used by the diabetic patients. 1 (7) Direct nitration of aniline is not carried out. Explain why? 1 (8) What type of linkage holds together the monomers of D.N.A
Premium Chemical reaction Chemistry Oxygen
Mrs. Feeney Biology 9 October 16‚ 2012 Identifying Organic Compounds Objective: To use indicators to test for the presence of organic compounds in certain substances. Theory: Major types of organic compounds in some common foods are Lipids‚ Carbohydrates‚ and Proteins. An indicator is a chemical compound that changes color and structure when exposed to certain conditions and is therefore useful for chemical tests. The purpose of using distilled water as one of the substances in the test
Premium Carbohydrate Protein Glucose
dsfgsfdhdhfg 9. What does a strong odour indicate about the ease with which the particles in a solid leave its surface? A strong odour in one of any of these soilds would simply mean that the molecules leave the surface easily. 10. From your answer to question 1‚ which of the two types of solids seem to have the stronger forces of attraction? Explain your answer. Camphor has a very strong odor which makes it easy for the particles in the soild leave it’s surface. The particle attraction
Premium Ion Chemical polarity Ionic bond
The process of naming compounds allows chemists to communicate formulae in words rather than in chemical symbols. There are‚ however‚ a few rules about naming compounds which need to be known in order to write a formula in word form or translate a compound in word form into chemical symbols. Ionic compounds If the compound is ionic‚ then the name of the cation (usually metal) comes first‚ followed by the ’compound’ name of the anion. To find the compound name of an anion‚ replace the end of the
Premium Ion Chemistry Molecule
PAKISTAN WINNING 20-20 WORLD CUP: A Nation battling Terrorist Attacks on a daily basis‚ An Attack on a visiting cricket team a few months ago threatened to isolate its national team and the country as a whole from the rest of the cricketing world with all the countries canceling their tours citing security reasons. To Make Matters Worse‚ The ICC cancelled all the matches which were allotted to Pakistan as a Host Nation for the 2011 Cricket World Cup & also shifted the Champions Trophy
Premium Cricket Pakistan national cricket team