Chemistry Essays, Research Papers & Term Papers (1,259) essays
Chemistry essays:
Dichlorodiphenyltrichloroethane and the Environment, The Global Impact.
... humans. He was later awarded the 1948 Nobel Prize in Physiology and Medicine for his efforts. DDT's effectiveness, persistence, and low cost resulted in its use in anti-malarial efforts worldwide. It was introduced into widespread use during World War II and became the ...
Marble chip investigation - rates of reaction, studying the effects of change in concentration of the acid
... the acid to change the concentration to what you need. 3.Take note of the amount of water in the measuring cylinder. 4.Put the marble chips and hydrochloric acid into the conical flask. Replace the bung and start the stopwatch. 5.Once the decided amount of time has passed, take note of the ...
Marie Curie
... of mathematics and physics. As her only role model Marie became fascinated with her fathers physics equipment. She like him was always quite and kept to her studies. Marie's family always valued there however at the time Poland had been divided up among Austria, Prussia, and czarist Russia so the ...
Radium. This essay describes, gives a history of, and gives properties of the element radium.
... world. It started with the discovery of pitchblende, which is an ore of uranium that is four or five times more radioactive than uranium itself. Pitchblende was discovered by Antione-Henri Baecquerel in 1896. In Paris, France in 1898 Marie and Pierre Curie were studying pitchblende separately ...
Niobium's use in Nuclear Reactors
... the incorporation of niobium into nuclear technology? How can these new technologies further benefit and edify out evolving society? As Alan Kay once stated, "The best way to predict the future is to invent it." Thus, in today's society, and ...
The history of the atom: the impossible atom
... basic of gasses, it has the ability to produce more than one hundred different colors. When a substance produces a spectrum of light, the pattern and colors displayed are unique to that substance, however it is universal for every substance of the same element. The Danish physicist by the name of ...
Design And Implementation Of An E-commerce Web Sit
... The result is that the design will be supported for a satisfactory amount of time in the future and it can be easily upgraded in the future without extensive change. 2.5.3 TECHNICAL ANALYSIS An evaluation of the technical merits of the system concept has ensured the structure and plan of the ...
Avagadro's Number
... the "Loschmidt constant" in his honour, and is approximately proportional to the Avogadro constant. The French physicist Jean Perrin in 1909 proposed naming the constant in honour of Avogadro. Perrin went on to win the 1926 Nobel Prize in Physics, in a large part for his work in determining the ...
In-depth explanation of the Haber Process.
... the temperature, the kinetic energy of particles will also decrease and therefore reducing the amount of collisions [7]. The collision theory states that a decrease in temperature will reduce the collision rate of particles and therefore reduce the reaction rate of the reaction. The reason why the ...
Lab Report: determine the molar mass of an unknown gas, from the gas density
... the density of air, and then multiply it by the volume of the bottle. We can find the density of the air by reading the barometer and thermometer, and then finding the table in the CRC Handbook, that will tell us what the correct density of air is. The reading on the barometer was 731.3 torr and the ...