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To help finance a major expansion, castro chemical company sold a noncallable bond several years ago that now has 20 years to maturity. this bond has a 9.25% annual coupon, paid semiannually, sells at
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The half life of the reaction is 1.60 × 105 s at 444 k. what is the rate constant when the initial [ch3nc] is 0.030 m?
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Calcium (atomic number 20) has electron configuration 1s2,2s2,2p6,3s2,3p6,4s2. The atomic number of scandium is 21. Which orbital does the 21st electron enter?
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A novel apparatus has been constructed that is both a hot plate and an analytical balance to determine how the waters of hydration are driven off from a sample of a hydrate. In this experiment, a 0.82
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Which sentence characterizes enzymes in the human body? A. Most are made of starch. B. Most catalyze only one type of reaction. C. Most require an acid to work. D. Most are lipids.
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Approximately how many atoms make up 2.3 moles of gallium A) 1.6x10^21 B) 3.8x10^22 C) 2.3x10^23 D) 1.4x10^24
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Which term names elements that are usually shiny and good conductors of heat and electricity? A. gases B. metals C. solids D. nonmetals
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How does a homogeneous catalyst compare with a heterogeneous one regarding the ease of recovery of the catalyst from the reaction mixture?
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The average volume of blood plasma in adults in 3.1 liter density = 1.03 g/ml. approximately how many grams of blood plasma are there in the average adult body ?
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After a few days, it is time to depart Cape Town and fly to Paris, a distance of 9,306 km. You take your Dassault Falcon 2000LXS jet, which cruises rather effortlessly at 450 knots. If 1 knot = 1.1508
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Can someone help me with drawing the lewis structure of (CH3)2CHCH2OCH2CH3? I've done it twice already and it still says it is incorrect. I don't see the problem and I'm about to quit. Here is a pictu
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3.6 grams of salt will dissolve in 10 grams of water. How many grams of salt will dissolve in 1000 grams of water?
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How many grams of methane gas (CH4) are in a 15.8-liter sample at 1.2 atmospheres and 27°C? Show all work used to solve this problem.
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Consider the balanced equation. PCl3 + 3H2O mc032-1.jpg H3PO3 + 3HCl What is the percent yield of HCl if 42.0 g of HCl are produced from the reaction of 62.0 g of PCl3?
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Create a scale for your model thermometer. Divide the distance between the two marks into 5-mm intervals. Starting with the lowest point, label the intervals on the straw 0, 1, 2, 3, and so on. Descri
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What is the freezing point of a solution prepared from 50.0 g ethylene glycol (c2h6o2) and 85.0 g h2o?
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The heat of formation of fe2o3(s) is -826 kj/mol. calculate the heat of the reaction for 4fe(s) 3o2 (g) → 2fe2o3(s) when a 55.8-g sample of iron is reacted. answer: δh of reaction
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Sodium hydroxide is used extensively in acid-base titrations because it is a strong, inexpensive base. a sodium hydroxide solution was standardized by titrating 30.65 ml of 0.1159 m standard hydrochlo
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0 ml of 0.120 m naoh is added to 565 ml of 0.200 m weak acid (ka = 8.25 × 10-5). what is the ph of the resulting buffer?
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High-density polyethylene may be chlorinated by inducing the random substitution of chlorine atoms for hydrogen. determine the concentration of cl (in wt%) that must be added if this substitution occu
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Calculate the concentration of the lactate ion in a solution that is 0.100 m in lactic acid (ch3ch(oh)cooh, pka = 3.86) and 0.080 m in hcl.
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Calculate the freezing point of a 2.5 m aqueous sucrose solution. (Assume that Kf for water is 1.86∘C/m.)
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Acetone is a common solvent and has a density of 0.7899 g/ml. What volume of acetone in ml has a mass of 28.6g
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At standard pressure, which substance becomes less soluble in water as temperature increases from 10 degrees Celsius to 80 degrees Celsius?
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An aluminum kettle weighs 1.05kg. What is the heat capacity of the kettle? How much heat is required to increase the temperature of this kettle from 23.0 °C to 99.0 °C? How much heat is required to
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A 14.01 g sample of N2 reacts with 3.02 g of H2 to form ammonia (NH3). If ammonia is the only product, what mass of ammonia is formed? (3 points) Equation of reaction: N2 + 3 H2 2NH3 Hint: First d
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Amy performed an experiment in lab. She improperly mixed the chemicals, and an explosion of light, sound, and heat occurred. When Amy mixed the chemicals, energy was
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In the following reactant 1.63g of NH3 is reacted with 3.47g of cl2. How much of the excess reactant is used
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The following table lists molar concentrations of seven major ions in seawater. Using a density of 1.022 g/mL for seawater, convert the concentrations for the two ions in the question below into molal
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Why do molecular compounds of low molecular weight tend to be gases at room temperature why not ci2?
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Neutron activation analysis for a sample of a rock revealed the presence of 140 56ba ,which has a half-life of 12.5 days . assuming the isotope was freshly separated from its decay products, what is t
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If 100 grams of copper (cu) completely react with 25 grams of oxygen to form only cuo with no reactant left over, how many grams of cuo will form from 140 grams of copper and excess oxygen?
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A zero-order reaction has a constant rate of 1.80×10−4 m/s. if after 35.0 seconds the concentration has dropped to 5.00×10−2 m, what was the initial concentration?
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Plato! In this redox reaction, identify the reducing agent. 2MgO---> 2Mg + O2 1)H2O 2)Mg 3)Mg0 4)0
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Determine the freezing point of a solution that contains 58.8 Napthalene dissolved in 360ml of Benzene (d= .877 g/ml) Pure Benzene has a melting point of 5.50 C and a freezing point depression constan
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I am stuck on the following question:A reinforced concrete column 300 mm square supports a direct load of 2.2 MN. What is the compressive stress in the column? I tried using this equation:But my answe
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Determine the amount of heat needed to convert 250 grams of ice at -9.50 degrees to water at 45 C degree?
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Which of the following is congruent with the figure above? Click the image below until you find the correct image.
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Write the mechanism for the two steps of the hydroboration/oxidation reaction of indene.please with details ?
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When the fission of uranium-235 is carried out, about 0.1 percent of the mass of the reactants is lost during the reaction. What happens to this “lost” mass? It is converted into another element.
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You made a 100.0 mL of a lead(II) nitrate solution for lab but forgot to cap it. The next lab session you noticed that there was only 80.0 mL left (the rest had evaporated). In addition, you forgot th
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You could add aquous hydrochloric to the solution to precipitate out silver chloride. What volume of a 0.130 M aqueous hydrochloric solution is needed to precipitate the silver ions from 30.0 mL of a
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The molecular scenes below illustrate two different mixtures. when mixture a at 273 k is heated to 473 k, mixture b results
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How many moles of magnesium hydroxide are needed to produce 74.7 milliliters of water, if the density of water is 0.987 g/mL? Show all steps of your calculations as well as the final answer. HNO3 + M
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How many grams of glucose (FW = 180.16 g/mol) are in 10.0 mL of a 0.25 M solution of glucose in water?
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Newborn Infants require 80 mg of Cu per kilogram of body mass per day . The Cu content of a popular baby formula is 0.48 mg of Cu per milliliter. How many milliliter should 7.0 lb baby consume per day
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How many liters of fluorine gas, at standard temperature and pressure, will react with 23.5 grams of potassium metal? Show all of the work used to solve this problem. 2K + F2 yields 2KF
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Predict how the addition of a catalyst would affect the rate of the reaction below, and explain your prediction H2 (g) + I2 (g) yields 2 HI
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When sensitivity of the balance is taken into account the two values obtained for the unknown mass are considered to be
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What is the third step of the hydrogen fusion process? A. + → + e+ + v + energy B. + → +2 + energy C. + → + energy D.6 + 2 → + 2 + energy + 2v
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