Tuesday, May 17, 2011

Exam Review #21

a) (8.418x10^24) atoms X 1 mol K/ 6.022x10^23 atoms = 13.98 mol K

4(13.98) = 55.92 mol K2S

55.92 mol K2S X 110.09g/1 mol K2S = 6156 g K2S

b)38.0L CCL4 X 1 mol CCL4 / 22.4 L CCL4 =1.70 mol CCL4

c) 20.8L CO X 1 mol CO / 22.4 L C) = .929 mol CO

.929 mol CO / 2 = .465 mol 02 = 2.79 x 10^23 atoms O2

Sunday, April 3, 2011

Works Cited For Radiation Post

Works Cited 
Information Sources:
Alice Park. “Feeding on Fallout.” Newsweek 4 Apr. 2011: 24. Print.
Effects of Radiation. N.p., n.d. Web. 3 Apr. 2011. <http://www.atomicarchive.com/‌Effects/‌radeffects.shtml>.
Kean, Sam. The Disappearing Spoon. N.p.: n.p., n.d. Print.
“Marie Curie.” Marie Curie. N.p., n.d. Web. 3 Apr. 2011. <http://www.aip.org/‌history/‌curie/‌brief/‌05_campaigns/‌campaigns_3.html>.
The Millisievert. N.p., n.d. Web. 3 Apr. 2011. <http://medical-dictionary.thefreedictionary.com/‌Microsievert>.

Image/Video websites:

THE ATTACK OF THE 100-Ft. CHEMISTRY PROJECT! (A detailed look at the real effects of radiation, and the ones seen in pop culture)

Everyone has heard something about radiation.  Whether it’s those of the baby-boom generation, who stayed up late to watch black and white horror films about giant irradiated monsters, or the newer generation who hear about nuclear power plants that are proposed to be a beneficial alternative energy sources, the word is thrown around a lot.  Throughout the years since the term was coined, however, the word’s true chemical meaning seems to be lost.  There are negative connotations of the word that call to mind glowing green piles of goo, and there are positive ones suggest new medical developments.  Because of the many distortions of the true meaning of “radiation”, it has become difficult to separate fact from fiction, scientific statistics from Hollywood theatrics, and actual dangers from popular misconceptions.  So, with this in mind, it becomes easier to dispel any rumors about radiation and learn what really makes it tick. Well, your Geiger counter any way.
            Fewer and fewer people can recall the Cuban missile crisis, or remember watching a “duck and cover” public safety videos in school, yet as Cold War memories fade, its effect on American pop culture still lingers.  With the shock of Hiroshima and Nagasaki still ringing in the public’s ears, an electrified America began its fascination with the idea of radiation.  In the 1950s, a new era for film emerged with the making of films like “Them!” and “Attack Of The 50-Ft. Woman” in which normal people and animals become radioactive and grow in size.  

The idea that radiation would cause you to grow to abnormal levels, however, was completely fabricated by screenwriters during this period who were in need for plot, and fascinated with radiation.  The recently released video game “Fallout 3” is a throwback to Cold War culture and imagines people affected by radiation to be glowing zombies who kill anything that moves. 

Even Japan began to imagine the long-term effects of the nuclear bombs that fell on their land with films involving giant radioactive monsters like Godzilla.  As pop culture became more and more influenced by radiation, stories began using it as a convenient way to begin a narrative.  This can be seen in older super-hero comic books like Spider-Man, in which the main character is bitten by a radioactive spider and given super-powers.

  Next, horror films began using radiation as an excuse to explain the origins of whatever monster is hunting the main character down.  Movies like “Class of Nuk’em High” involve highly unbelievable effects of radiation on people and animals.  Radiation’s burst of influence on pop culture in the late 20th century, though misleading about its true effects, spread awareness about the subject across the nation.
Today, most people are aware that radiation does not turn you into a flesh-eating zombie, or enable you to fly and shoot lasers out of your eyes, but they still don’t fully comprehend its actual scientific effects.  Most of what we know about radiation started with Marie Curie, a Polish scientist who lived from 1867 to 1934.  During her life she discovered two new radioactive elements, made great advancements in the study of radiation, and devoted much of her time to creating institutions for research about radiation.  Unfortunately, Curie died of aplastic anemia, a blood disease caused by her long-term exposure to radiation.  However, through this tragedy, much has been learned about the harmful effects of radiation. 

A similar story can be seen in the tale of David Hahn, a Detroit teen who, in the mid-90s, attempted to build a nuclear reactor in his backyard shed.  After acquiring dangerous elements from sources like broken-up batteries and smoke detectors, David ended his project with a criminal record and a radioactive shed.  Though the effects of the radiation have yet to show themselves, doctors are guessing that young David may have shortened his life.  The actual effects of radiation can be seen in the diagram below:
 One way of measuring radiation is in a unit called millisieverts.  Essentially, it measures the amount of radiation absorbed by an object.  Watch this educational video in which our beloved Fox E. Flynn is pumped with millisieverts and observed for reactions to learn more about the effects of radiation.

            Recently, because of the crisis in Japan, radiation has been a popular subject for discussion.  People are in a rush to understand what short-term and long-term impact this incident will have on Japan.  Hopefully, no one is wondering what radioactive monster this disaster will give birth to.  Radiation is very dangerous, and many people have given up their lives to understand more about it.  Though pop culture depicts false ideas about radiation, there is legitimate concern about the harmful effects of radiation.

Sunday, January 23, 2011

Everyday objects that look like VSEPR's!

1) Trigonal Pyramidal - This is a stand for a camera that can basically wrap around anything.  Most of the time it's in this shape which reminds me of a Trigonal Pyramidal VSEPR.

2) Linear - This is the back truck of my skateboard.  If you imagine the 2 wheels and the bolt in the middle are atoms, it looks like a Linear VSEPR diagram.

3) Bent - This coat hanger reminds me of a Bent molecular geometry if you disregard the cardboard bottom.

4) Trigonal Planar - My old slingshot makes me think of a Trigonal Planar molecular geometry.

5) Tetrahedral - This is my multi-tool that I use to fix up my skateboard.  Because of the 4 prongs, it reminds me of a Tetrahedral molecular geometry.

Chemistry Haiku

(pretend bongo drums are playing when you read this)

O covalent bonds,
Atoms sharing electrons,
Mostly non-metals

NOTE: I would have used electronegativity in the poem but it has 8 syllables, so don't count off points please.

Saturday, December 11, 2010

My 10 ions for my group (Daniel and Me)

Shown below is my word file containing all the delicious ions i found hiding in my pantry.  Check these out!

Item Name
Barbecue Lays potato chips
Salt/sodium chloride
Armour Vienna Sausages
Sodium nitrate
Kraft Easy Mac original
Potassium chloride
Mrs. Baird’s 7-grain Bread
Calcium sulfate
Ranch Style Black Eye Peas
Sodium phosphate
Ranch Style Black Eye Peas
Sodium nitrite
Ranch Style Black Eye Peas
Calcium chloride
Nestle Hot Cocoa
Potassium phosphate
Tropicana Orange Juice
Calcium hydroxide
Sura Lee Hot Dog Buns
Ammonium sulfate

Wednesday, November 10, 2010

Mid Term Review #11

11) What is an excited state for an atom?  How do they occur?

- An excited state of an atom is when an atom gains energy or electrons and jumps an energy level.  This state is usually unstable however.  These occur when energy is gained by an atom.  An example of this is neon lights.  They produce light because the atoms in the Neon, when given energy through an electric current, become excited.  Yes quite exited indeed.