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IR sources – consist of inert solid and heated electrically to very high temperatures 1 500-KICK to get a continuum of radiation. Unrest Glower- composed of rare earth oxides (Zero, YEA, and Error) current is passed thru the device so that the device can reach the high temp of 1200-KICK, spectral out in the IR region Global source- silicon carbide rod heated to 1300-KICK Disadvantage […]

1. (a) I, III, and IV are correct. II is not correct. To explain III, de Broglie’s equation states l = h/(mv), so nl = nh/(mv) = 2pi(r). Where: l = wavelength, v = velocity of electron, n = some positive integer, r = distance of electron from center, m = mass of electron. Solve, get mvr = L = nh/2pi. (b) The current wave […]

* Question 1 10 out of 10 points | | | According to VSEPR theory, which one of the following molecules should have a bent  shape? Answer| | | | | Selected Answer:|   Cl2O| | | | | * Question 2 10 out of 10 points | | | According to the VSEPR theory, the molecular shape of SiCl4 isAnswer| | | | | Selected Answer:|   tetrahedral. […]

3. 1 & 3. 2 Chemistry Notes Dalton * In 1805, John Dalton reintroduced the idea to explain 3 fundamental principles Experimental Work * Atoms of different elements have different properties * Law of definite proportion and multiple compositions: atoms of 2 or more elements can combine in a fixed ratio to form new substances depending on their combining capacities (eg. H2O vs H2O2) * […]

Stereoisomers are defined as molecules of indistinguishable atomic composings ( molecular expression ) , but with different adhering agreements of atoms or orientation of their atoms in infinite. Based on this definition, several types of isomerism are possible including constitutional, configurational, and conformational isomerism. Constitutional isomers ( besides called structural or positional isomers ) are molecules with the same atomic composing but different adhering agreements […]

To determine the Kf for naphthalene, we need to find the difference in the freezing point of pure naphthalene and the solution of 1,4-dichlorobenzene in naphthalene. Let’s say that we did this experiment, used 1. 00 g 1,4-dichlorobenzene in 10. 00 g naphthalene, and found that the freezing temperature of pure naphthalene was 78. 2°C, while that of the solution was 75. 4°C. This gives […]

Design Lab #17: Reaction Rate – Calcium Carbonate & Hydrochloric acid Design D: Introduction: In this experiment calcium carbonate will be put into a flask and mixed with hydrochloric acid to produce calcium chloride, water, and carbon dioxide. The formula for this reaction is: CaCO3(s) + 2HCl(aq) > CaCl2(aq) + CO2(g) + H2O(l) Purpose: The purpose of this experiment is to determine how the surface […]

Pre-Lab Questions 1. In the design of a Bunsen burner, explain the purpose of a. The gas control valve regulates the rate at which methane enters the burner. b. The air vents. The air vents control the rate at which air enters the burner 2. Why is a luminous yellow often ‘‘smoky’’? The luminous yellow e is smoky because no air is entering the burner […]