CHE 140 Name__Chesi Spriggs First Hour Exam Potentially useful information 1000 g = 1 kg 1000 mL = 1 L 1 in = 2.54 cm 1 mL = 1 cm3 D = m/v Select the best choice for the following questions. ___e___ 1. A hypothesis is a(n) a. formulation of principles based on facts. b. modification of a theory. c. organized body of knowledge. d. tentative explanation of observations. e. None of the above. __b___ 2. The initial success of the Bohr theory was based
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Scientists require a large amount of equipment in order to successfully plan‚ complete‚ and analyze experiments they conduct. The specific apparatus used varies significantly from lab-to-lab and depends mostly on that particular lab’s planned experiments. However‚ most lab equipment falls into one of a relatively small number of categories. Glassware The bewildering array of available glassware includes several specialized pieces of equipment that scientists use to measure liquids and crystallize
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__________. A) trigonal planar B) trigonal bipyramidal C) tetrahedral D) trigonal pyramidal E) octahedral 11. The Cl-Si-Cl bond angle in the SiCl2F2 molecule is approximately __________. A) 90° B) 109.5° C) 180° D) 60° E) 120° 12. The O-S-O bond angle in SO2 is slightly less than __________. A) 109.5° B) 120° C) 180° D) 60° E) 90° 13. The hybridization of orbitals on the central atom in a molecule is sp2. The electron-domain geometry about this central atom is __________. A)
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Keghan Chapter 8 MULTIPLE CHOICE QUESTIONS Topic: Structure Elucidation 1. An alkene adds hydrogen in the presence of a catalyst to give 3‚4-dimethylhexane. Ozonolysis of the alkene followed by treatment with zinc and acetic acid gives a single organic product. The structure of the alkene is: CH3 A) CH3CH=C-CHCH2CH3 (cis or trans) CH3 CH3 B) CH3CH2C=CCH3 (cis or trans) CH2CH3 C) CH3 CH2=CCH2CHCH2CH3 CH3 CH2 D) CH3CH2CCHCH2CH3 CH3 CH3 E) CH3CH2CHCHCH=CH2
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Alternative Energy Alternative Energy Alternative energy refers to energy sources that have no undesired consequences such for example fossil fuels‚ nuclear energy and falling water. Fossil fuels are coal‚ petroleum and natural gas. There are some characteristics of the fossil fuels that made the concept of alternative energy come into place. (Alternative Energy) One of the fossil fuels‚ Petroleum‚ forms a thin film around the grains of the rock where it formed. Pressure from the overlying rock
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Name: _____________________________ Submit Worksheets for Credit Stereochemistry Workshop 1. Assign the marked asymmetric centers with R or S designations. 2. Rank each of the following sets of substituents (highest priority substituent = 1; lowest priority substituent = 4). Place the number in the blank below the substituent. (a) (b) 3. Determine the relationship between each of the following pairs of structures (enantiomers‚ diastereomers‚ constitutional isomers
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Short-term interest expense= $625‚000 x 5% = $31‚250 Total interest cost = $31‚250 +$77‚500 = $108‚750 Earnings before interest and taxes = $200‚000 - $108‚750 = $91‚250 Earnings after taxes = $91‚250 – 30% = $91‚250 - $27‚375= $63‚875 b. As an alternative‚ Lear might wish to finance all fixed assets and permanent current assets plus half of its temporary current assets with long-term financing. The same interest rates apply as in part a. Earnings before interest and taxes will be $200‚000. What will
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CLINICAL CHEMISTRY – defined as the study of biochemical processes associated with health & dse & the measurement of constituents in body fluids or tissues to facilitate dx of dse - dual nature since it’s both a basic and applied science thus clin chem. technologists & technicians should have an understanding of the physiologic & biochemical processes occurring in the body‚ as well as technical skills to perform the various tests - chemistry in connection with the management
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CERTIFICATE This is to certify that Ranjeeta Singh of class XI (Science) has completed the chemistry investigatory project entitled The Study of the Acidity of Different Samples of Tea Leaves and the Reasons for the Variation in their Taste as a partial fulfillment of course curriculum under the supervision of Mrs. Mamta Agarwal. This is a bonafide work prepared by herself. Signature of Internal Examiner ACKNOWLEDGEMENT I bonafied CBSE for giving us
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Biology Laboratory Report Practical 4 Food tests Introduction The main components of food are proteins‚ fats‚ carbohydrates‚ and‚ of course‚ water. Proteins‚ lipids and carbohydrates are carriers about energy necessary for vital activity. They are a plastic material for the formation of structures of the body‚ as well as used for the synthesis of hormones and substances that transmit signals in the nervous system. Our food also includes food (plant) fibers‚ has recently seemed unnecessary ballast
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