Know Algerbra
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For chemistry, you have to know the basics of algerbra, because there is gonna be algerbra based stuff, in order to get your answer
Chemistry
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http://course-notes.org/Chemistry
STUDYstuff
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STUDYstuff
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STUFF I SHOULD KNOW FOR THE AP TEST BUT DO NOT KNOW YET IONS LIST acetate C2H3O2? ferric Fe3+ (yellow) oxalate C2O42? aluminum Al3+ ferrous Fe2+ (green) oxide O2? ammonium NH4+ fluoride F? perbromate BrO4? barium Ba2+ hydrogen H+ perchlorate ClO4? bicarbonate HCO3? hydronium H3O+ periodate IO4? bisulfate HSO4? hydroxide OH? permanganate MnO4? (purple) bisulfide HS? hypobromite BrO? peroxide O22?
Chemistry Lab Report Examples
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Atomic Mass of Beanium Lab Report Name & Name Experiment done on October 18th, 2011 Submit: ______________ Introduction In the ?Atomic Mass of Beanium? lab, our objective was to find the # of isotopes of a made up element, ?Beanium?, as well as the mass of each isotope, its abundance, and the ?Atomic Weight? of the new element. Name and I were given three types of beans, which would represent this ?Beanium? element, and then used them in order to determine the abundance of each variation of ?Beanium?, as well the average mass (atomic weight) of the element. We were then required to compare the average mass that accounted for abundance to the standard measurement of average mass. Materials Used A sample of ?Beanium Atoms? (A bag of three types of beans)
Chemistry notes on radioactivity and carbon dating/decay
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Chemical changes: breaking bonds between atoms + rearranging into new compounds. Nuclear Changes: changes in p&n within a nucleus, not between atoms. Half life= time it takes for ? of parent nuclides in radioactive sample to decay. Ex. Element has ? life of 5 seconds left in 1 minutes. So divide 60 sec by 5 sec. = 12. Nuclide: name given to nucleus of a specific isotope that is decaying. Ex. U-238 and U-239. Radiation. Chain rxn: nuclear rxn that becomes self propagating. Critical Mass: minimum amount of original mass undergoing fission to sustain a chain rxn. Nuclear Waste: low level- buried in barrels in the ground (lab wastes, industry) High level- stored in concrete bunkers in ground (spent fuel rods)
Separation of Components of a Mixture Lab
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Separation of the Components of a Mixture Dillan Patel, Joe Marciano, Jamie Henzes Pre Lab Questions Mixtures are not uniform in compositing and are characterized by two properties: each of the substances in the mixture retains its chemical integrity and mixtures are separable into these components by physical means. An impure substance is a mixture where one of the substances is preponderant and far exceeds the amounts of the other substances in the mixture. Sublimation is the process in which a solid passes directly to the gaseous state and back to the solid state without the appearance of a liquid state. In this lab we sublimed NH4CL by applying heat.
CHemistry questions and answers
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light mechanical model
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the amplitude of a wave is the wave's height from zero to the crest.
the wavelength is the distance between the crests.
the frequency is the number of wave cycles to pass a given point per unit of time.
the SI unit of cycles per second is called hertz (Hz).
the wavelength snf frequency of light are inversely proportionate to each other.
the product of the frequency and wavength is always a constant (c), the speed of light.
pKa Chemistry Lab Report
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Pre Lab Questions: 1. H3PO4 + H20 ( H30+ + H2PO4- Ka1 = [H2PO4-][ H30+]/[ H3PO4] pH = pKa1 ??+ log [A-]/[HA] pH = -log( 7.5 x 10-3) + log (1) pH = -log( 7.5 x 10-3) pH = 2.12 Methyl Red would not be a proper indicator because the color change of this titration occurs between the pH?s of 4 and 5. The pH of the indicator should be close to the pH of the equivalence point. The indicator should change color at a pH of around 2.12, therefore, Orange IV would be the indicator to use since it changes from Orange to Peach at around a pH of 2.5. Results & Data: Experiment Table Unknown Trial pH pH (average) pKa Unknown ID C Sample #1 6.76 6.76 6.76 KH2PO4 Sample # 2 6.76 Table of Unknowns Acid Formula Ka of Conjugate Acid pKa
AP Chemistry - Brown & Lemay Text
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Lexi Eyerman ? AP CHEM SUMMARY 29 Sept. 2011 AP CHEMISTRY: UNIT 2 [pgs. 198-273, chapters 6-7] Scientific Laws, Theories, and BIG Ideas The Wave Nature of Light Electromagnetic Radiation ? energy carried through space (ex/ light) Dual-nature of Electrons & Photons Quantized Energy: Planck?s Constant (see Equations section); only a certain fixed quanta of energy is emitted (one/ a few fixed wavelengths) Photoelectric Effect: light can be particle-like (photons) Electrons have energy and frequencies associated with them and require a certain quanta of energy to change energy levels. Electrons Energy is negative and becomes less negative as you go outward Writing electron configurations: n = size of path (Principle Quantum Number, a.k.a. P.E.L)
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