Chemistry 161 Sample Quiz Chapters 1&2 KEY Harold Note: You have already received a significant figures/scientific notation sample quiz. The first ten problems (20 points) will be of exactly the same type. The numbers will be changed to offend the guilty (those who did not use the sample test as a study guide). 1. The term that refers to the reproducibility of a laboratory measurement is a. precision. b. repeatability. c. accuracy. d. exactness. e. the number of S.F. 2. The distance
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and boiling point of water. In Celsius thermometer‚ lower fixed point is 0 ºC and upper fixed point is 100 ºC‚ in Fahrenheit thermometer lower fixed point is determined as 32 ºF and upper fixed point as 212 ºF and finally‚ lower fixed point of Kelvin thermometer is 273 ºK and upper fixed point is 373 ºK. These temperatures are determined with considering the freezing point and boiling point of water. (As previously stated above). 3. Types of Thermometers Clinical Thermometer Clinical
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Ideal Gas Behavior Author: VanessaStoll Lab Partners: Janelle Vallejo Instructor: Nieves Montano Chem 151‚ Section 002G Date Work Performed: February 12‚ 2014 Date Report Submitted: February 20‚ 2014 Abstract: This paper reports a lab experiment done on the ideal gas law to determine differences in gas based upon their “R” constant difference to 0.082057. A total of seven gases were tested‚ which included‚ Ethanol‚ Hexane‚ Cyclohexane‚ Pentane‚ Ethyl Acetate‚ Butane and Acetone
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ASTRINDO COMPANY IN INDONESIA BY Kelvin Angelo G0777530Q UB Number: 10041047 Project submitted to the University of Bradford‚ School of Management In partial fulfilment of the requirements For the degree of BSc (Hons) in International Business Management Studies BMGD2 1104A 2013 ASSIGNMENT SUBMISSION SHEET STUDENT NUMBER G | 0 | 7 | 7 | 7 | 5 | 3 | 0 | Q | NAME (Block capitals): Kelvin Angelo MODULE TITLE: International
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ORGANIZATIONAL HEROES: COMMUNICATING WHAT MATTERS MOST EXECUTIVE OVERVIEW Who are our organizational heroes? What makes an organizational hero? And why do we need heroes in the organization? We attempted to find the answers from a group of middle-level executives in Hong Kong. They were asked to identify critical incidents showing behaviors of their bosses‚ peers‚ or ordinary employees who have acted in ways perceived as being "heroic." The respondents represent a broad sample of companies
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Study of Solubility Equilibrium of Potassium Hydrogen Tartrate Wang Haina 1. Aim 1. To determine the solubility of potassium hydrogen tartrate (KHT) at various temperatures from 10°C to 50 °C‚ and determine the corresponding Ksp at these temperatures. 2. To obtain the changes in enthalpy and entropy of the dissolution of KHT from the dependence of Ksp on temperature. 2. Results and discussion 2.1 Collection of data A portion of KHT (1 to 1.5 g) was added into about 100 mL of deionised
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Temperature(T) = 9.2 K This example will guide you to calculate the temperature manually. Gay-Lussac’s Law: Gay-Lussac’s Law states that the pressure of a fixed amount of gas at fixed volume is directly proportional to its temperature in kelvins. Gay-Lussac’s Law Formula : Gas Equation: Pi/Ti = Pf / Tf Initial Pressure(Pi) = PfTi / Tf Initial Temperature(Ti) = PiTf / Pf Final Pressure(Pf) = PiTf / Ti Final Temperature(Tf) = PfTi / Pi where‚ Pi = Initial Pressure‚ Ti = Initial
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Biomolecule BCH 3101 Thermodynamics of Biological Systems • Movement‚ growth‚ synthesis of biomolecules‚ and the transport of ions and molecules across membranes all requires energy. • All organisms acquire energy from their surroundings and utilize that energy efficiently to carry out life processes. • In order to study these bio-energetic phenomena we will require knowledge of thermodynamics. BCH3101 1 • Thermodynamics: defined as a collection of laws and principles describing the flows and
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4 °C = (18.4+273.2) °K = 291.6 °K Uncertainty of 18.4 °C is ± 0.5 °C (Half of the smallest interval on an analogue scale) Converting to relative uncertainty = ± (0.5/18.4) × 100% = ± 2.717391304% (Relative uncertainty is same for measurement in Kelvin since the conversion uses an exact value) ≈ ± 3% Volume of gas (m3) = 237 mL = (237/1000/1000) m3 = 0.000237 m3 Uncertainty of 237 mL is ± 1 mL (Half of the smallest interval on an analogue scale) Converting to relative uncertainty = ± (1/237) ×
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1. It is estimated that uranium is relatively common in the earth’s crust‚ occurring in amounts of 4 g/metric ton. A metric ton is 1000 kg. At this concentration‚ what mass of uranium is present in 1.0 mg of the earth’s crust? a) 4 nanograms b) 4 micrograms c) 4 milligrams d) 4 × 10–5 g e) 4 centigrams Ans: a) 4 nanograms Page: 1.3‚6 2. In 1928‚ 1.0 g of a new element was isolated from 660 kg of the ore molybdenite
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