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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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A sponge and a bar of soap occupy the same amount of space, but the soap is much more dense than the sponge? The soap has a greater volume than the sponge. The soap has more mass than the sponge. The
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What are some applications of the field of spectroscopy? Check all that apply. for identifying elements in a sample for determining the distance and velocity of galaxies for producing neon lights for
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Identify the number of significant figures (sig figs) in each of these values. note: if any part of this question is answered incorrectly, a single red x will appear.
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Calculate the cal (kcal) in 1 cup of whole milk that contains 12g of carbohydrates, 9g of fat and 9g of protein
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A subset of patients with DLD deficiency experience muscle cramps after exercise. Based on your knowledge of the regulation of glycolysis and/or TCA why would this symptom appear. HINT: your answer
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A 48.10-mL sample of an ammonia solution is analyzed by titration with HCl. The reaction is given below. NH3(aq) + H +(aq) → NH4+(aq) It took 39.56 mL of 0.0963 M HCl to titrate (react completely wi
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A 100.0-ml sample of water is heated to its boiling point. how much heat (in kj) is required to vaporize it? (assume a density of 1.00 g>ml.)
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How much heat energy is produced by 0.5 Wh of electrical energy? A. 2.6 Btu B. 0.4 Btu C. 1.7 Btu D. 0.15 Btu
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The pk of phospohirc acid is 7.21. what isthe useful buffering range of this acid and its conjugate base
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Titanium has an atomic number of 22. The following orbital notation for titanium is incorrect. Explain the error in terms of the rules for electron arrangements. Titanium: 1s is filled. 2s is filled.
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As cold air rises, warm air moves in to take its place and creates movement we feel as wind. The meeting of air masses with the same temperatures often brings rain and storms.
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Calculate the amount of heat required to heat a 3.9 kg gold bar from 24 ∘ C to 67 ∘ C . Specific heat capacity of gold is 0.128 J/ g ∘ C .
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Scientists previously referred to the long-ago deposited plant and animal remains, now buried, compacted, and transformed into coal and oil, as the dead-end of the carbon cycle. Since the Industrial R
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I cannot seem to get past this Chemistry question. I know I'm missing a step, as I'm able to complete 80% of it. What I'm I missing? Please solve and explain the steps to me!
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A solution is made by dissolving 10.20 grams of glucose C6H12O6 in 355 grams of water. What is the freezing point depression of the solvent if the freezing point constant is -1.86 C/m? Show all of the
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Which of the following types of fingerprints is collected with gray or black powder and fingerprint tape?
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A penny has a mass of 2.50g and the Moon has a mass of ×7.351022kg, How many moles of pennies have a mass equal to the mass of the moon?
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When the tank and its contents have cooled to 20.0 ∘c , what additional volume of ethanol can be put into the tank? express your answer using two significant figures?
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In a 0.27 m solution, a weak acid is 2.5% dissociated. (a) calculate the [h3o+], ph, [oh −], and poh of the solution.
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Why is white light the best for photosynthesis ? Why is blue light best for photosynthesis? Why is orange light best for photosynthesis? Why is green light the worst for photosynthesis?
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In a given diffusion apparatus, 15.0 mL of HBr gas diffused in 1.0 min. In the same apparatus and under the same conditions, 20.3 mL of an unknown gas diffused in 1.0 min. The unknown gas is a hydroca
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Mercury metal is poured into a graduated cylinder that holds exactly 22.5mL. The mercury used to fill the cylinder weighs 306.0g. From this information, calculate the density of mercury.
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Which of the following aqueous solutions will have the lowest vapor pressure at 25°C? 2.0 M CH4 1.0 M AlCl3 1.0 M NaCl 1.0 M BaCl2
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