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A soap bubble had rainbow-colors and broke after forming a colorless part. What is the name of “colorless part”? Calculate its thickness as “a water film (n = 1.333) in air (n = 1)”. [*Visible
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Ea for the uncatalyzed reaction o3(g) + o(g) → 2 o2(g) is 14.0 kj. ea for the same reaction when catalyzed is 11.9 kj. what is the ratio of the rate constant for the catalyzed reaction to that for t
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How much pressure in kpa does 2 moles of nitrogen gas at 55°c exert on a container that holds 63 l of gas?
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An industrial chemist studying bleaching and sterilizing prepares several hypochlorite buffers. find the ph of 0.300 m hclo and 0.250 m naclo. (ka for hclo = 2.9 × 10−8)
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The value of δg°\' for the conversion of glucose-6-phosphate to fructose-6-phosphate (f6p) is 1.67 kj/mol. if the concentration of glucose-6-phosphate at equilibrium is 1.95 mm, what is the concentr
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How many grams of NaCl must be added to 250 g of water to lower the vapor pressure by 1.30 mmHg at 40 ∘C assuming complete dissociation?
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State whether the following changes are physical or chemical and state your reason for your choice. P or C These are the ones I'm confused on. 2. Sulphur is burned 3. Gasoline explodes 4. A match is s
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Use your knowledge of chemical reactions, metals, and acids to determine which one of the following procedures is the least hazardous
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A sample of a compound contains 32.0 g c and 8.0 g h it's molar mass is 30 G / Mol what is the compounds molecular formula?
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Which of the following elements do you expect should have a higher first ionization energy than krypton does? Xe He Te Cs
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A student writes the following statements about the relationship between mass defect and nuclear binding energy. 1. When an isotope’s protons and neutrons come together to form a nuclide, a small am
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how is it that an electron behaves like a particle and at the same can act like a wave?
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Which of the following reasons explains why some cooking pots are made of metal, but their handles are made of wood? Both wood and metal have low thermal conductivity. Both wood and metal have high th
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Assuming 3.0% hydrogen peroxide by weight has a density of 1.00 g/mL, demonstrate that an excess of hydrogen peroxide was used in the oxidation step of Fe(II) to Fe(III). Think about redox balancing w
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Consider a galvanic cell in which Al3 is reduced to elemental aluminum, and magnesium metal is oxidized to Mg2 . Write the balanced half-cell reactions that take place at the cathode and at the anode.
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Calculate the theoretical yield of ammonia produce by the reaction of 100 g of h2 gas and 200 g of n2 gas 3h2+n2=2nh3
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What is the frequency of the light based on Optical fibers allow the fast transmission of vast amounts of data. In one type of fiber, the wavelength of transmitted light is 8200 nm?
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What is the difference between a pure substance, a mechanical mixture, and a solution? Give an example of each.
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Ethanol (C2H5OH) melts at -114°C. The enthalpy of fusion is 5.02 kJ/mol. The specific heats of solid and liquid ethanol are 0.97 J/g-K and 2.3 J/g-K, respectively. How much heat (kJ) is needed to con
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Identify what type of reaction is below. Also determine what coefficients that would balance the chemical equation. ___ Fe(OH)2 → ___ FeO + ___H2O A) Single Replacement; 3, 1, 2 B) Decomposition; 1
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5 Questions to answer please 1) Electrons are transferred in the formation of ______________ bonds. A) ionic B) covalent C) metallic D) all chemical 2) Which pair below describes isotopes of the s
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Heat is added isothermally to 4.40 mol of a monatomic ideal gas. the temperature of the gas is 372 k. how much heat must be added to make the volume of the gas double?
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A glass flask whose volume is 1000.44 cm3 at 0.0∘c is completely filled with mercury at this temperature. when flask and mercury are warmed to 56.0 ∘c, 8.80 cm3 of mercury overflow.
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What is the electric field strength in the proton's reference frame? express your answer as an integer and include the appropriate units?
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How much heat is evolved when 22.5 grams of a food sample changes the temperature of 0.79 KG of water by 4 degree C. Assuming specific heat to be 4.18 j/g/C
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How do scientists produce new genetic variations not found in nature? By A) transforming RNA B) using gel electrophoresis. C) using lasers to cut and paste DNA. Eliminate D) causing mutations with che
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Provide a summary as to how the bond dipoles affect the molecular dipose. also, describe how the geometric orientation of the bonded atoms affect the molecular dipole?
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A 290kg bookshelf is resting on a 10.0 kg dolly with wheels. A person pushes on the bookshelf and dolly with a force of 20.0 N to the right. What is the speed of the bookshelf in m/s after 1 second?
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What is the mass of a cube of aluminum that is 4.0 cm on each edge? The density of aluminum is 2.7 g/cm3
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Choose one type of lipid and discuss its structure (draw out an example and identify all functional groups, its properties and its biological function
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Consider the chemical equation in equilibrium. CH4(g) + H2O(g) mc004-1.jpg CO(g) + 3H2(g) What will happen to the equilibrium of this reaction if CO is added to the system?
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This is known as a beer's law plot, the expression for which is a = e*c. a is the absorbance, c is the concentration, and e* is the effective molar absorptivity which is the slope of a beer's law plot
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What type of energy is present in the batteries of a flashlight? Mechanical energy Electrical energy Chemical energy Radiant energy
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Calculate the pH for each of the following cases in the titration of 50.0mL of .130M HClO(aq) with .130M KOH(aq).
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A [ ] property is a characteristic of matter that describes its ability to change into a different substance.
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Hi, I'm having trouble with these questions; they're stoichiometry chemistry questions. I don't understand them and I'd appreciate if you were to help me! Thanks!
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Which salts will be more soluble in an acidic solution than in pure water? 1)PbSO4 2)KClO4 3)CuBr 4)BaSO3 5)Ni(OH)2 There is more than one correct answer Thanks in advance :)
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Sunflowers have specialized cells that enable the sunflower to track the Sun. Which of the following allows the sunflower to move to face the Sun? A. Gravity B. Electricity C. Fraction D. Turgor
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What is ppm? A. Concentration of a solute in mol/mol solution B. Concentration of a solute in grams/106 grams solution C. Concentration of a solute in mol/kg solvent D. Concentration of a solute in mo
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Brainliest if answered in next 10min correct answers please Describe what happens to the electrons in a neon that is heated to incandescence and then when the heat energy is removed. please help if a
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What is the solubility of marble (i.e., [ca2+] in a saturated solution) in acid rainwater, for which ph=4.20?'?
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Part aconsider these hypothetical chemical reactions:a⇌b,δg= 14.3 kj/molb⇌c,δg= -28.2 kj/molc⇌d,δg= 9.00 kj/molwhat is the free energy, δg, for the overall reaction, a⇌d?
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How much energy (in kj) is released by the combustion of 13.50 kilograms of propane in sufficient oxygen?
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A galvanic cell consists of a mg electrode in a 1.0 m mg(no3 )2 solution and a ag electrode in a 1.0 m agno3 solution. calculate the standard emf of this cell at 25°c
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Formula and structure of potassium hydrogen phthalate (KHP) used to standardize the solution of NaOH in this experiment
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1. For Part 1, describe the changes in the colors of the well, if any, as you go from well 1 to well 9—that is, as you go from the well with the least copper(II) nitrate to the well with the most co
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2SO2 + O2 = 2SO3 + heat what will happen if more surfer trioxide has is added to the reaction mixture
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A sample of vinaigrette salad dressing has a total mass of 188 g, a total volume of 196 cm3, and consists only of oil (density = 0.891 g/cm3) and vinegar (density = 1.056 g/cm3). What is the volume of
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What makes this excerpt from Oliver Twist by Charles Dickens an example of direct characterization? The elderly female was a woman of wisdom and experience; she knew what was good for children; and sh
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A sample of hydrated magnesium sulfate has a mass of 4.052 g. After it is heated, it has a mass of 1.979 g. What is the percentage by mass of water in the hydrate? Use the formula mc011-1.jpg 10.99% 2
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