Chemistry

process of heat treatment and it's meaning
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Exploring the Electromagnetic SpectrumAssemble the electromagnetic spectrum by dragging each piece to the correct place on the wavelength scale.Visible10-210-71010-910-5Wavelength (cm)(PLEASE HELP!!)
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Hydrogen peroxide is commonly used to clean cuts and wounds. Its chemical formula isH2O2. This compound has _____.two atoms of hydrogenthree atoms of oxygenthree atoms of hydrogenone atom of oxygenPlease help, take your time!
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Describe all the types of chemical reactions with example.
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which elements total number of electrons is equal to the number of core electrons in barium(Ba)?
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An atom's first 2 energy levels are filled and there are 2 electrons in the third energylevel. It's atomic number is:
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which of the following has more atoms 3.14 g Cu or 1.10 g of H? Explain
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Calculate the pH of each solution.A. 0.18 M CH3NH2B. 0.18 M CH3NH3ClC. a mixture of 0.18 M CH3NH2 and 0.18 M CH3NH3Cl
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What is the oxidation number of the metal ion in the coordinate complex [Fe(CN)6]3?A. NCO-B. -OHC. -CND. -SCN
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why can't sodium salt be prepared by double decomposition
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What is the percentage by mass of carbon in CH3(CH2)5COOH?A. 48.6%B. 9.2%C. 55.4%D. 64.6%
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Imagine a substance that is a red, shiny solid at room temperature, with a melting point of 115 C. It is brittle and a poor conductor of heat. State whether this substance is a metal or a non-metal. Give a reason for your answer.
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How many moles of Fe contains 3.41 x 1023 Fe atoms?
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What is the relationship between temperature and kinetic energy?
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At 25 oC the solubility of chromium(III) iodate is 2.07 x 10-2 mol/L. Calculate the value of Ksp at this temperature. Give your answer in scientific notation to 2 SIGNIFICANT FIGURES (even though this is strictly incorrect). [a]
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Arrange the compounds by their reactivity toward electrophilic aromatic substitution. a. Benzene, ethylbenzene, chlorobenzene, nitrobenzene, anisole.b. Toluene, p-cresol, benzene, p-xylene.c. Benzene, benzoic acid, phenol, propylbenzene.d. p-Methylnitrobenzene, 2-chloro-1-methyl-4-nitrobenzene, 1-methyl-2,4-dinitrobenzene, p-chloromethylbenzene.
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Give the formula of each coordination compound. Include square brackets around the coordination complex. Do not include the oxidation state on the metal. Use parentheses only around polyatomic ligands.a) potassium tetracyanonickelate(II)b) sodium diamminedicarbonatoruthenate(III)c) diamminedichloroplatinum(II)
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For the reaction 2HNO3 + Mg(OH)2 + Mg(NO3)2 + 2H20, how manygrams of magnesium nitrate are produced from 3.54 mol of nitricacid, HNO3?O a. 220O b. 263O c. 1050O d. 175
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By using photons of specific wavelengths, chemists can dissociate gaseous HI to produce H atoms with certain speeds. When HI dissociates, the H atoms move away rapidly, whereas the heavier I atoms move more slowly. If a photon of 231 nm is used, what is the excess energy (in J) over that needed for dissociation
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define measurment and its importance
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Which of the following releases hormones into your bloodstream?A. Endocrine systemB. Sympathetic nervous systemC. Lobal systemaD. Autonomic nervous system
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Nucleophilic aromatic substitution involves the formation of a resonance-stabilized carbanion intermediate called a Meisenheimer complex as the nucleophile attacks the ring carbon carrying the eventual leaving group.a. Trueb. False
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FILL IN THE BLANK:The rate of a reaction is measured by how fast a (Product Or Reactant)is used up or how fast a (Reactant Or Product) is formed?
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The Bohr effect:_____.a. explains through the Bohr model of the atom why Fe2+ will bind O2 in heme but Fe3+ will not. b. contributes to binding of O2 by hemoglobin in lungs and release of O2 from hemoglobin in tissues. c. applies to both myoglobin and hemoglobin. d. relates [H+] to [CO2].
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