Chapter 8 outline Case study: Be Careful where you put Unwanted Pests in the Everglades • “everglades national park was overrun with pythons • Fortunately the alligator is a successful predator • 8.1- why were introductions of new species into Europe so popular long ago? • Today human introduction of species into new habitats is one of the most troublesome problems with life on earth • In 1749 Linnaeus was one of the first scientists botanists and father of modern taxonomy of plants sent a
Premium Evolution Biology Life
AMA taps Net for enrollment Updated March 22‚ 2002 - 12:00am 0 9 googleplus0 0 Everything in life has virtually gone electronic‚ including enrollment for a college education in today’s cyber age. Check out "My AMA" online. The Web-based enrollment at AMA Computer University (AMACU) introduces a fast-paced‚ mobile and highly interactive method of enlisting oneself for a college education. My AMA features a pioneering Online Enrollment System‚ which includes basic information
Premium Education University SMS
were used to determine the melting point. 6. The bicarbonate extract was acidified with concentrated HCl. A piece of litmus paper showed that it was acidic. 7. The benzoic acid was extracted by shaking it with25ml portions of dichloromethane. The organic extracts were collected in a pre-weighed Erlenmeyer flask and evaporated on the steam bath. The mass of Benzoic acid produced was determined. RESULTS (i) Naphthalene: 0.85g; Benzoic acid: 0.71g (ii) The melting point of Naphthalene: 80-89º
Free Liquid Water Sodium bicarbonate
12/05/09 ENGU100 Assignment #5 – Point By Point Compare and Contrast High school and college are alike but also different in many ways. They are both educational institutions which help people achieve greater intelligence but differ in certain factors. High school is a mandatory and free secondary institution of learning‚ while college is both voluntary and expensive. In high school‚ students are guided for what responsibilities they have and students are corrected if they are out of line.
Free High school Education College
and Sciences Experiment #3 SEPARATION AND PURIFICATION OF ORGANIC COMPOUNDS: CRYSTALLIZATION Gomez‚ Paola Anne M. DOP: 2 July 2013 Student no. : 4120403 DOS: 9 July 2013 Group: Carcinogenic Remarks: _____________________________________________________________________ Engr. C. D. Sanchez Instructor THEORETICAL DISCUSSION Crystallization is a technique which chemists use to purify solid compounds. It is one of the fundamental procedures each chemist must master
Premium Chemistry Solution Solubility
the freezing point depression of a known amount in an aqueous solution. Freezing point depression is a colligative property of solutions. There are three other properties‚ which are boiling point elevation‚ vapor pressure depression‚ and osmotic pressure. Colligative properties of a solution depend on the amount of solute and solvent molecules and not the specific properties of the molecules. The temperature at which the solvent starts to freeze will be specified as the freezing point of the solution
Premium Temperature Water Chemistry
information about boiling water. If you cover the tin and allow the water and air to cool down‚ the air will cool and contract‚ lowering the pressure in the tin. If it lowers enough‚ the partial vacuum will collapse the walls of the can! The boiling point definitely reduces with air pressure. There is a famous demonstration where boiling water or coffee is drunk‚ the trick is it was in a vacuum chamber where it boiled at room temperature. The actual definition of the boiling point of water is the
Premium Water Boiling Pressure
Contribution of Emile Durkheim (bullet points) Religion Durkheim believed that god concept is collective creation and power that is used by groups to direct the behaviour of its members. The basic principles of religion and rituals is to keep solidarity in the society especially in the periods of conflict. Function of religion is not to worship the god but the society. Within division of labour Durkheim made clear distinction between mechanical and organic solidarity. Mechanical solidarity
Free Sociology Émile Durkheim
AND PURIFICATION OF ORGANIC COMPOUNDS AIMS: To isolate organic‚ inorganic and component from a given sample. To become acquainted with various separation methods. To examine the solubility behavior of the various compounds in a mixture using different solvents. INTRODUCTION A commonly used method of separating a mixture of organic compounds is known as liquid-liquid extraction. Most reactions of organic compounds require extraction at
Premium Solubility Solvent Acid
Use this packet and your book to answer the questions throughout this packet. Organic Nomenclature - Alkanes‚ Alkenes‚ Alkynes Naming organic compounds can be a challenge to any chemist at any level. Historically‚ chemists developed names for new compounds without any systematic guidelines. In this century‚ the need for standardization was recognized. For simple molecules‚ the nomenclature system worked out by the International Union of Pure and Applied Chemists (IUPAC) works well. For complex
Premium