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If a pure r isomer has a specific rotation of –147.0°, and a sample contains 61.0% of the r isomer and 39.0% of its enantiomer, what is the observed specific rotation of the mixture?
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What is the half-life of a first-order reaction if it takes 4.8 ´ 10-3 seconds for the concentration to decrease from 1.33 m to 0.51 m?
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Winds are generated by pressure differences in the atmosphere. Which factor is directly responsible for these pressure differences in the atmosphere? A) The day–night cycle on Earth B) Uneven landfo
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In the following reaction, 451.4 g of lead reacts with excess oxygen forming 312.5 g of lead(II) oxide. Calculate the percent yield of the reaction.
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what acids are in caffeine, nicotine, p-amino benzoic acid, aspirin, linoleic acid, vitamin c, ibuprofen, acetaminophen, histamine, safrole, glucose fructoe, sucrose, cortisone, cysteine
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1. What is the cause of the Coriolis effect? A: Changes in wind direction B: Earth's Rotation C: Relative Humidity D: Koppen Zone 2.Which Term is given to the amount of water that is in any specific a
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According to the law of conservation of mass, how much magnesium oxide will there be after the chemical change is complete?
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A mass of 0.630 g of nacl is dissolved in 525 g of water. part a calculate the molality of the salt solution.
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A sample in a 1 cm cuvette gives an absorbance reading of .558. if the absorptivity for this sample is 15000L/(mol.cm), what is the molar concentration?
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If you had only 25 g of KOH remaining in a bottle, how many milliliters of 7.0 %(w/v) solution could you prepare?
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A chemist who studies water samples did a demonstration of how to test for lead in water. She added a clear solution of potassium iodide to a clear solution of lead nitrate. Then a yellow swirling sol
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Describe the sequence of adding ingredients to make the recipe for condensed tomato soup. To mix the ingredients, you have an industrial-sized vat with a capacity of 800 L. You also have the ability t
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I need a lab repot. Please check these attatch files first.
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Read this article and fill up the sheet.
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I need help with question 3, 4, 5, 6,9
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What are some patterns we can use in order to predict reactivity in elements based on the periodic table?
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When will the following thermodynamic terms of formation be equal to zero? Delta H f S f Delta G f
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hydrolysis reaction that produces Propanol
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Please read those three pages of article and Write summary and finish some questions.
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Reaction of 1-butanol with NaNh2
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qestion of P-block
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Chemistry
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CHEM LAB ESSAY
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drawing shape (with net dipole) and dipole moment
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Chem assignment
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how do i convert 4.95×1022 zinc atoms to grams
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CHEM ( ACID AND BASE)
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help
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How do you compare intermolecular forces?
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Science questions
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Dimensional analysis
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CHEM
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Average atomic mass, help please.
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phase diagrams
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Freundlich adsorption isotherm: Physical Chemistry
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Reading Assignment (CHEM)
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Passing ch3br in agcn
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chemistry
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calculating mole ratio
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biochemistry Literature
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You have gas! Well, you have a 450.0 mL sample of gas in a flexible container at 298.15 K. If you heat the gas to a temperature of 315.15 K, what is the new volume in liters (L)?
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You have a mixture of 3 gasses with a total pressure of 750 mmHg. If gas A is 125 mmHg and gas B is 343 mmHg, what is the partial pressure of gas C?
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You have a fixed container with a volume of 5.00L that contains 35.0 g nitrogen gas (N2). If the temperature is 298 K, calculate the pressure in the container. R = 0.0821 L atm / mol K
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I'm looking at the barometer in my lab as I type this question. It says the pressure is 760 torr. What is this pressure expressed in mm Hg?
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A sample of gas has an initial volume of 3.5 L at a pressure of 970 torr and a temperature of 25*C. If the sample is heated to a temperature of 40*C and expands to a volume of 6.8 L, what is the final pressure in torr?
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If I have a cylinder that holds 10.7 L of gas at 298 K, how many liters of gas could it hold at 352 K?
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Chemistry
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One way to make ammonia is to synthesize it directly from elemental nitrogen and hydrogen
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Propane is commonly used to heat gas grills. Using the balanced equation below and stoichiometry, which of the following is FALSE? C3H8 + 5O2 → 3CO2 + 4H2O
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Which of the following is NOT true regarding calculating percent yield?
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