15 Results for chemistry

The History of Soap Most people washed themselves with only one essential thing at the time, water. This, of course, happened until the development of soap in 2800 B.C. The soap was found in clay cylinders during the excavation of ancient Babylon. There were inscriptions discovered on the cyli...
Water Degradation Based on the article: River Life Through U.S. Broadly Degraded. By William K. Stevens, Jan. 26, 93 Society has been presented with a broad spectrum of cause and effect relationships within the water based ecosystems. Without a conscious effort to rehabilitate our water sy...
Chemistry Term paper and Biology year end report All about Gatorade It is often debated in the sports world, whether water is the best drink to be drinking during sports activity or whether another drink can fuel the body up faster and more proficiently. It is widely believed that nothing beats ...
The oceans are said to be the "source of life." The enormous, blue, calm oceans are the signatures of the planet earth. They cover nearly three-fourths of the surface of the earth. This is equal to 71 percent of the earth's entire surface or about 361 million sq km (140 million sq m...
For years ever since most of the world has been industrialized, the effects of pollution have plagued nations alike. Acid rain is one of the largest contributors to this industrialized form of pollution. Throughout this report an explanation of the devastating effects to the environment caused b...
The element Bromine, is a red liquid which is explosive at room temperature and has a red brown vapour. It has an atomic number of 35 and an atomic mass of 79.909. The melting point of Bromine is -7 deg.C and the boiling point is 58 degC with a relative density of 3.1. Bromine is a volati...
Climate switch Introduction What is the oceans role in climate? The oceans play a vital and pivotal role in the distribution of life sustaining water throughout our planet. 86% of the evaporation that occurs on earth is over the oceans. The oceans are the planets largest reservoir of water tr...
Modeling of Water Uptake into Polymeric Aerosol Particulates Deposited on the Lung Surface Neil Gupta Biological Transport December 12, 2001 Abstract Inhalation of aerosolized drugs holds promise as a means to treat localized disease states within the l...
Introduction A team was sent to the chemical manufacturing division of a small chemical company to help the technicians with experiments. Since the notes written by the technicians were inaccurate and unfinished, all of the experiments they had preformed needed to redone and documented correctly....
Purpose: To demonstrate the isolation of a natural product from a biological source (tea bags) using extraction techniques, and to demonstrate purification by sublimation. Procedure: In a 400ml beaker, 15 tea bags were submerged in approximately 125ml of water. This was brought to a boil ov...
In this paper I will describe the molecular structure and the chemical properties of water. Also I will discuss the importance of water to living organisms and the effects of acid rain on our environment. Water, as a molecule is a bent molecule and this characteristic makes it a very polar. W...
Chapter 15 Vocab Boiling temperature elevation- property of solutions that describes temperature difference between boiling point of a pure solvent and temperature at which solution begins to boil. Colligative property- characteristic of a solution that does not depend on size or type of particl...
DECLINING CLARITY OF A JEWEL - EXPLORING LAKE TAHOE BY LESLIE WATSON ELLINGSON APRIL 20, 2000 TABLE OF CONTENTS Lake Tahoe An Introduction Page 2 Lake Tahoe -- History Page 3 Figure One -- Tahoe Region Map Page 3A Lake Clarity -- Introdution to Causes Page 5 Figure Two -- Se...
Investigating the Rate of Reaction Between Marble Chips And HCL Safety- must always wear safety glasses and we should be very careful not to drop any acid. ...
Acid Rains Scientific evidence has shown that atmospheric deposition of sulfur and nitrogen compounds can harm ecosystems. Title IV of the Clean Air Act Amendments of 1990 (CAAA or the Act) addresses the problem of such effects by mandating reductions in emissions of sulfur and nitrogen oxides, t...