Unit 3‚ Key Questions MDM4U-B Lesson 11 42.a) ii): equal to about half. There are 26 red cards out of a deck of 52 playing cards. Therefor the theoretical chance of drawing a red card is . b) i): equal to about 1. The sun shines all year round‚ including the summer. Even though you may not be able to see the sun cause it’s hidden behind clouds it’s still shining. c) iii): equal to about 0. When you roll two dice‚ it is impossible to roll a sum of 1. The lowest sum you can roll with two dice is
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World War 1 Questions 1. Which three countries were in the Alliance of the Three Emperors? A. Italy‚ France‚ England B. Germany‚ Russia‚ Austria C. Germany‚ Austria‚ Prussia D. Serbia‚ Greece‚ Bulgaria Answer: B. Germany‚ Russia‚ Austria 2. What was key to Bismarck’s plan to maintain Germany’s power prior to WWI? A. Invade to surrounding countries B. Defeat Britain in naval combat C. Aid the Ottoman Empire through military force D. Maintain peace throughout Europe‚ namely between
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experimental techniques which can be used to tell us where the atoms are located in a molecule. Using advanced techniques‚ very complicated structures for proteins‚ enzymes‚ DNA‚ and RNA have been determined. Molecular geometry is associated with the chemistry of vision‚ smell and odors‚ taste‚ drug reactions and enzyme controlled reactions to name a few.
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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 on a. its ability to predict the atomic spectra of multi-electron atoms. b. its ability
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1 in vapour state sulphur partly exists as S2 molecule which has 2 unpaired electrons in the antibondind pi orbitals jus lyk oxygen and thus exhibits paramagnetism. 2 An interhalogen compound is a molecule whose atom contains two or more different halogen atoms (fluorine‚ chlorine‚ bromine‚ iodine or astatine). Most interhalogen compounds known are binary (composed of only two distinct elements). Their formulas are generally XYn‚ where n = 1‚ 3‚ 5 or 7‚ and X is the less electronegative
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1. (a) The diagram below represents the industrial fractional distillation of crude oil. (i) Identify fraction A. (ii) What property of the fractions allows them to be separated in the column? (2) (b) A gas oil fraction from the distillation of crude oil contains hydrocarbons in the C15 to C19 range. These hydrocarbons can be cracked by strong heating. (i) Write the molecular formula for the alkane with 19 carbon atoms. (ii) Name the type of reaction involved in cracking. (iii) Write
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contains THIRTY-EIGHT questions in FIVE sections: Sections A‚ B‚ C‚ D and E. Answer THIRTY-FOUR questions only Section A: THIS SECTION HAS BEEN WITHHELD BY THE FACULTY Answer ALL THIRTY questions on the MCQ sheet provided Section B: Answer ONE question Section C: Answer ONE question Section D: Answer ONE question Section E: Answer ONE question Section A is worth 30 marks and Sections B to E are worth 15 marks each ANSWER SECTIONS B TO E IN SEPARATE
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and write it to the left of the problem number in the space provided. 1. What is a particular advantage of graphite furnace atomic absorption over flame atomic absorption? (a) higher temperature (b) lower S/N (c) less interference (d) small sample amounts 2. In atomic emission spectroscopy‚ it is desirable to have a high concentration of the element in the form of: (a) atoms in the ground state (b) atoms in the excited state (c) ions (d) atoms as compounds 3
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Question 1 Electromagnetic radiation behaves both as particles (called photons) and as waves. Wavelength () and frequency () are related according to the equation where is the speed of light (). The energy ( in joules) contained in one quantum of electromagnetic radiation is described by the equation where is Planck’s constant (). Note that frequency has units of inverse seconds ()‚ which are more commonly expressed as hertz (). Part A A microwave oven operates at 2.40 . What is the wavelength
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Extraction of Aluminium Aluminium ore is called bauxite. Bauxite contains aluminium oxide‚ water‚ iron oxide and other impurities. The purified dry ore‚ called alumina‚ is aluminium oxide (Al2O3). The alumina must be molten for electrolysis to work‚ since the ions are not free to move in the solid state. Unfortunately‚ alumina has a high melting point (2040 °C) and it is not practical to do electrolysis at such a high temperature. In the middle of the nineteenth century it was found that alumina
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