Acid Rain
.... believed that acidic rain may be causing
great ecological damage to the planet. The problem was that by the time that the
scientist found the problem it was already very large. Detecting an acid lake is
often quite difficult. A lake does not become acid over night. It happens over a
period of many years, some times decades. The changes are usually to gradual for
them to be noticed early.
At the beginning of the 20th century most rivers/lakes like the river
Tovdal in Norway had not yet begun to die. .....
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Acid Rain
.... the acids
fall to the earth in any form it will have large impact on the growth or the
preservation of certain wildlife.
NO DEFENCE
Areas in Ontario mainly southern regions that are near the Great Lakes, such
substances as limestone or other known antacids can neutralize acids entering
the body of water thereby protecting it. However, large areas of Ontario that
are near the Pre-Cambrian Shield, with quartzite or granite based geology and
little top soil, there is not en .....
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Aerosol Spray Cans
.... by the
coil spring directly below the valve stem. When the push button is pressed, it
forces the valve stem down in its housing, uncovering a small a small hole which
leads up through the stem to the nozzle in the button. This allows the product
to be forced up the dip tube by the gas pressure in the can. The nozzle is
shaped to give a spray or a continuous stream.
To produce a fine mist, a propellant is used which mixes with the
product. The two leave the nozzle together and the propellant evaporates a .....
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Analysis Of A Vapor Power Plant
.... liquid at P2 leaves the
open feedwater heater. The efficiencies of all pumps are 80%, and the
efficiencies of all turbines are 85%.
Throughout this report the states will be referenced as depicted above with the
numbers 1-13. The analysis of the system will involve the use of the Energy Rate
Balance to isolate the specific enthalpies and associated values of temperature,
pressure, specific volume, and steam quality. The Entropy balance equation will
be used to calculate the specific entropy at all .....
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Analytical Chemistry
.... is
accomplished when a known one is found with identical properties. If none is
found, the uknown substance must be a newly identified chemical. Tests should
not use up excessive amounts of a material to be identified. Most chemical
methods of qualitative analysis require a very small amount of the sample.
Advance instrumental techniques often use less than one millionth of a gram. An
example of this is mass spectrometry.
Quantitative chemical analysis is used to determine the amounts of
constituent .....
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Rutherford's Gold Foil Experiment
.... famous Gold Foil experiment
which revolutionized the atomic model.
This experiment was Rutherford's most notable achievement. It not only
disproved Thomson's atomic model but also paved the way for such discoveries as
the atomic bomb and nuclear power. The atomic model he concluded after the
findings of his Gold Foil experiment have yet to be disproven. The following
paragraphs will explain the significance of the Gold Foil Experiment as well as
how the experiment contradicted Thomson's atomis mo .....
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Asimov On Chemistry By Isaac Asimov
.... they made the
spectroscope. Only then does he start to mention a element a french chemist
belived to be new or maybe just a heavier from of nitrogen. Inert gases and
there liquefaction points are then listed along when they when fisrt liquefied
by a chemist. Welcome, Stranger!
This talks about the rarest of stable enert gases, xenon. It also tells
why that in 1962 so many expirements were done involving this gas. Fisrt it
defines the word gas, and talks about different types in about four pages. The .....
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Asymmetric Epoxidation Of Dihydronaphthalene With A Synthesized Jacobsen's Catalyst
.... (III) chloride (Jacobsen's Catalyst).
(R,R) Jacobsen's Catalyst Jacobsen's catalyst opens up short pathways to
enantiomerically pure pharmacological and industrial products via the
synthetically versatile epoxy function .
In this paper, a synthesis of Jacobsen's catalyst is performed (Scheme
1). The synthesized catalyst is then reacted with an unfunctional alkene
(dihydronaphthalene) to form an epoxide that is highly enantiomerically enriched, .....
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Atom Book
.... each ring or shell. In
this case helium has 1 ring with 2 electrons in it. An aatom can have up to only
7 rings.
An atomic symbol is the letter(s) that describe the element. Like He means
helium, but if you wrote it HE it could mean something totally different so be
careful.
An isotope has fewer or more neutrons than protons. So there isn't the same
number of protons as neutrons.
Well now that I'm big again I hope you learned everything you wanted to know
about atoms.
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Historical Development Of Atomic Structure
.... chemical elements
(which states that elements show a regular pattern ("periodicity") when they are
arranged according to their atomic masses), published his first attempt to
classify the known elements. His name was Mendeleyev, and he was a renowned
teacher. Because no good textbook in chemistry was available at the time, he
wrote the two-volume Principles of Chemistry (1868-1870), which later became a
classic. During the writing of this book, Mendeleyev tried to classify the
elements according to their .....
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The Bunsen Burner
.... you can’t see the yellow flame
anymore. Then put the dish in the hottest part of the flame and see what happens.
After you do that. You would cut off the burner by closing the needle value and
closing the barrel. Then you would cut off the gas.
In the conclusion the hottest part of the flame was the top part of the
flame, and the coolest part of the flame was the blue cone in the middle. Soot
was on the bottom of the dish the first time. When you put the dish back in the
hottest part of the flame. It h .....
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Cosmetology
.... would work a full work day. Most
people work 44 hours a week, but some work 48 hours or more.
There are many ways to get schooling to be a cosmetologist. You
could go to either a public or private vocational school, which some high
schools offer. You could also go to a beauty school. You must be 16 or
older to go to a beauty school. In your classes your training courses may
include lectures, demonstrations and practice. Students usually practice
with mannequins. After schooling, you must take a sta .....
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The Creation Of The Universe
.... knowledge that lies deep within ourselves. As for
myself, I cannot believe in a being which created a universe and a
multitude of worlds in a rather short period of time then deigns to lower
itself into becoming a puppet-master and "pulling the strings" of the Earth
and all of the people therein.
Since this paper touches upon many scientific terms, I feel that in
order for the reader to correctly grasp the content I must first define
three words: Theory, Law, and Hypothesis. The definitions wi .....
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Chloroflourocarbons
.... hospital sterilants.
Another use found for them was to blow liquid plastic into various kinds of
foams.
In the 1930's, household insecticides were bulky and hard to use, so CFCs
were created because they could be kept in liquid form and in an only slightly
pressurized can. Thus, in 1947, the spray can was born, selling millions of
cans each year. Insecticides were only the first application for CFC spray cans.
They soon employed a number of products from deodorant to hair spray. In 1954,
188 mill .....
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A Chemist
.... expected to increase
21% (Choices).
After finding a job in the chemistry field that you will enjoy another
quesiton arises, money. On hte average if you begin working at a entry level
job witha bachelors degree your salary will be somewhere around $24,000 a year.
If you start work with a masters degree you can expect about $32,000 and with a
Ph.D. as mcuh as $60,000 ("Chemists")
Research and development is the subcareer most chemist choose. In this
subfield your primary goal would be to look .....
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