Which of the following pairs is correctly matched? A spatula : scoops out solids B crucible tongs : holds test tube beaker : measures volume of liquids D hotplate : supplies flame
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A: Option B.
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A: T = 25 0C = 298.15 K (Temperature in K = Temperature in 0C + 273.15 ) For NO2 : ∆Gf° = ∆Hf° - T∆S°...
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Q: Nitrogen dioxide decomposes according to the reaction: 2 NO2(g) 2 NO(g) + O2(g); Kp = 4.48 x 10-13 ...
A: Kp = 4.48 x 10-13
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Q: 4 5.00 5.00 4.00 6.00 6. 3.00 7.00
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Q: How many grams of CuCl2 (MW = 134.45 g/mol) is needed to prepare 100.0 mL of 0.2418 M CuCl2?
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- Which glassware Burnett, graduated celinder or pipette is most precise, why?For the separatory funnel shown in the Student Protocol video, the closed position of the stopcock has the handle of the stopcock in which position? A. Diagonal B. Vertical C. Horizontal D. RemovedMetals, polymers, and ceramics form what "new" class of materials? Pick the correct answer: A) Laminates B) Exotics C) ceramics D) Alloys
- Measurements of a patient's temperature are routinely done several times a day in hospitalsDigital thermometers are used, and it is important to evaluate thermometers and select the best one. The accuracy of these thermometers is checked by immersing them in liquids of known temperature. Such liquids include an ice-water mixture at 0.0and boiling water at 100.0C at exactly 1 atmosphere pressure (boiling point with atmospheric pressureSuppose the data shown in the following table were obtained on three available thermometers and you were asked to choose the "best one of the three Which would you choose? Explain your choiceOrganic liquids are usually less dense than water. True FalseWhich of the following are not allowed? State which rule is violated for any that are not allowed. (a) 1p3 (b) 2p8 (c) 3g11 (d) 4f2
- The purpose of a centrifuge is to separate a sample into a Choose...solid,warm,pure component and a Choose...liquid,cold,impure component.Differentiate between Penetration and Shielding?What unknown solid sample has a melting point range of 78 degrees celcius to 81 degrees celcius? What is the percent error in its melting point?
- 13.Calibration must be properly done to ensure that glass ware and equipment are in good working condition. Anybody can perform calibration of an equipment.a.Both statements are correctb.Both statements are incorrectc.The first statement is incorrect while the second statement is correctd.The first statement is correct while the second statement us incorrect14.Glass measures are preferred for measuring liquids becausea.All of theseb.It is easy to handlec.Of its coefficient of expansiond.Transparency of the glass can more accurately indicate volumeSprinkle some black pepper on the surface of some pure water in a saucer. The pepper floats. Add a drop of liquid dish soap to the surface, and the pepper grains repel from the soap droplet. Stir gently once or twice and watch the pepper sink.104. Highly resistant borosilicate is what type of pharmaceutical glass for containers? a. I B. IV C. III D. II 105. If a certain hydrogen peroxide solution is 20-volume hydrogen peroxide, it contains: I. 3% Hydrogen Peroxide II. 6% Hydrogen Peroxide III. 10 mL Oxygen IV. 20 mL Oxygen A. I, IV B. II, IV C.I, III D. IV E. II, III