out of these pieces.
Points Earned: 1.0/1.0
Correct Answer(s): A
Chemical reactions involve:
A) The sharing or trading of protons.
B) The sharing or trading of neutrons.
C) The sharing or trading of electrons.
D) The sharing or trading of partons.
E) The sharing or trading of quarks.
Feedback: The clouds of electrons around the nuclei of atoms serve as the Velcro of the universe. Atoms gain or lose electrons and then stick together by static electricity, or else share electrons and stick together inside the shared cloud. The nuclei with their protons and neutrons (which are themselves composed of quarks, which also were called partons at one time) are the things held together by the electronic Velcro of chemistry.
Points Earned: 1.0/1.0
Correct Answer(s): C
One of the big problems faced by National Parks is that:
A) They must allow people to enjoy things today, and preserve those things for the future, but achieving both of these is not easy.
B) They must provide marriage counseling for their moose, so that the mommy and daddy moose have lots of baby moose that can be sold on the export market to raise money to pay the rangers.
C) They must preserve valuable things for the future, and not allow people to enjoy those things today, but people want to enjoy them now.
D) They must sell more Pepsi than Penn State, or the Congress will cut their funding, and selling that much Pepsi isn’t easy.
E) They must allow…
Whether we notice it or not, chemistry lives in our bodies. Things such as skin
conditions, digestion, breathing, and hair growth all deal with chemistry in their own way. They all have certain chemical reactions and chemical changes that affect the way our bodies work. Even though we study different curriculums during chemistry such as the chemical equations, chemical reactions, and other things we have learned go far beyond what is said in class.
During food digestion there are…
Everything is made of atoms, which are the smallest representative parts of each of the ninety-two elements that occur in nature. Elements are either metals, such as iron, copper or calcium or non-metals such as carbon, oxygen or nitrogen. Chemistry is concerned with the way atoms link together to form molecules, which are the natural chemical units of matter. Molecules represent the smallest particle of a chemical compound which retains the characteristics and chemical properties of the…
Importance of Nuclear Chemistry
Among the several sub categories of science, nuclear chemistry is a remarkable subject which can be used to fulfill the needs of human beings. Nuclear chemistry is the study of the chemistry or the mechanism of radioactive elements such as, Uranium, Actinides, Radium, Radon, etc. (Smith et al.). Nuclear chemistry has a long history which, started in 1896 with the discovery of radioactivity of radium by the famous scientist Marie Curie (Budinger and Jones). Since…
a pH lower than zero and concentrated caustic solutions with a pH greater than 14. Such solutions are in fact typical of many ore extracting processes that require the digestive power of caustics and acids.
Low pH acid waters accelerate corrosion by supplying hydrogen ions to the corrosion process. Although even absolutely pure water contains some free hydrogen ions, dissolved carbon dioxide (CO2) in the water can increase the hydrogen ion concentration. Dissolved CO2 may react with water to…
Practice Final Exam Version 2 Name___________________________________
Chemistry 201 (Eikey)
Part 1: MULTIPLE CHOICE (48 points). Choose the one alternative that best completes the statement or answers the question. Record your answer on the scantron. Each question is worth 3 points. 1) A student weighed 30.00 µg of sulfur in the lab. This is the same mass as A) 3.000 × 10 4 ng. B) 3.000 × 10 -5 mg. C) 3.000 × 10 -8 g. D) 3.000 × 10 -5 kg. 2) 1)
2) A student performs an experiment to…
and forth for a while. My guidance counselor would call me down to his office to discuss the idea that my high school was going to cut the AP chemistry class for the following year and I had to pick a new science class for my junior year. When I asked why he told me that there were only eleven people signed up for the class and that they wanted fifteen to keep it open. To be fair it was understandable that most people would not want to sign up. Many found honors chemistry to be incredibly…
Lab 2: The Chemistry of Life Name _____Aniqa Qureshi_
Insert the chemical symbol in the answer blank for each of the following elements.
___O______ 1. oxygen
___C______ 2. carbon
___K______ 3. potassium
___I______ 4. iodine
___H______ 5. hydrogen
___N______ 6. nitrogen
____Ca_____ 7. calcium
____Na_____ 8. sodium
____P_____ 9. phosphorus
____Mg_____ 10. magnesium
____Cl_____ 11. chloride
____Fe_____ 12. iron
In the space below, list the chemicals (above) from the MOST…
Development of an Equation
Purpose: Investigate a chemical reaction using lab procedures and observations. Then, find a pattern of reactivity and explain the findings using a chemical equation and particle diagram.
Procedure: Refer to: Department of Chemistry, The Ohio State University. "Development of an Equation." General Chemistry 1210 Laboratory Manual. Vol. 2013-2014. Plymouth: Hayden-McNeil. 32-35.
Part A: In the potassium iodide solution, I think there were…
Coffee, Caffeine, Chemistry
Coffee is a life saver for most people in the morning. Sometimes you just need that extra kick of caffeine to start your day, however many people hardly know what exactly they’re consuming. Some don 't know where it came from, the benefits, harmful effects, etc. I am here to tell you all about it, starting with the origin. Coffee is a drink of precision, and of intellect. To truly understand this drink one must go back in time where it was discovered in Ethiopia And…