Variables Independent variable: The temperature of HCl is going to be changed. The temperature 10℃‚30℃‚50℃‚70℃ and 90℃ of hydrochloric acid will be used to conduct the experiment. The hot plate is going to be used to reach 30℃‚50℃‚70℃ and 90℃‚ that are higher than the room temperature. Ice cubes can be used with water bath to make 10℃ hydrochloric acid. Dependent variable: The time it takes for carbon dioxide gas produces up to 20mL of gas syringe is going to be measured. It will be measured
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Chemical equilibrium is the point at which the concentrations of reactants and products do not change with time. It would appear as if the reaction has stopped‚ but in fact‚ the rates of the forward and reverse reactions are equal‚ causing the reactants and products to be created at the same rate. This can be expressed mathematically in the form of the equilibrium constant. The following is the general equation for a reversible chemical reaction: aA+bB →cC+dD
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Rafael Rodriguez CV Address 15700 Lexington Blvd Apt 417‚ Sugar Land‚ TX‚ 77478‚ USA Telephone: Home 1+512-217-7093 E-mail: mecrafael@gmail.com Objective: Full Time Position Personal Statement I have a Master in Science in Mechanical Engineer from the University of Texas at Austin‚ with industry experience‚ interested in innovative implementations on project/engineering management‚ design‚ manufacturing and new product development. I am looking for a position
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Module 1: Lesson 5 ASSIGNMENT (12 marks) Lesson 5 Assignment Part 1: Molar Heat Calculations (3 marks) 1. Calculate the molar enthalpy of the NaOH(aq) using the data obtained from this experiment. Show all your work. Answer: Specific heat capacity: 4.19 J/g∙°C 50.0 ml of 1.0 mol/L NAOH Initial temperature: 23.9 °C Final temperature: 32.9 °C Change in temperature: 9 °C Q = mc∆t = (80g)(4.19 J/g∙°C)(9°C) = 3016.8 J or 3.0168 kJ ∆rH = n∆rHm 3.0168 kJ = (0.05
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fdsgdsfgdsfgsdgdsgsdfEssay 1.(a) State experimental evidences for i) strong repulsive force ii) strong attractive force between atoms in a solid. (b) A simple model for the oxygen molecule consists of two equal masses connected by a light spring . The atoms oscillate along their lines of centre while the midpoint of the spring remains fixed. i) Write down an expression for the frequency of oscillation of one oxygen atom in terms of its mass m and the force constant K of
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Kenny hill 4.6.11 Period: 2 Partners: Perla Garibay Jorge Rivera Building an energy pyramid activity Purpose: students will gain an understanding of how energy flows through an ecosystem by constructing an energy pyramid and calculating how much energy is transferred between trophic levels Materials:*energy pyramid template‚ species list‚ pyramid data sheet‚ calculator‚ one 1‚000ml beaker‚ 3 clear cups‚ one 1ml pipette‚ pen or pencil Question: how much energy is transferred from one
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Year 10 MYP Chemistry Investigating Thermoregulation Research Question. How does varying the surface area to volume ratio (2.0046: 1‚ 1.4923: 1‚ 0.9425: 1‚ 0.6480:1‚ 0.5970:1) affect the amount of heat lost over a period of 6 minutes of 50cm3 water with a temperature above 50? b. Prediction and Hypothesis. Make a prediction about what you expect to be the outcome. Explain your prediction using scientific ideas. I predict that the bigger the surface area to volume ratio‚ the lesser
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D. F. Nachman Thermochemistry: An Ice Calorimeter Determination of Reaction Enthalpy 9/11/2014 Introduction: A chemical reaction often indicated by a transfer of energy measured in heat. By measuring this heat transfer in a constant pressurized environment‚ the enthalpy of the reaction can be used to infer certain information about a specific reactions reactants and products. The transfer of heat from outside sources in would be described as an endothermic reaction. Contrary‚ when
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1. Suppose that an open box is to be made from a square sheet of cardboard by cutting out 6-inch squares from each corner as shown and then folding along the dotted lines. If the box is to have a volume of 486 cubic inches‚ find the original dimensions of the sheet of cardboard. 2. A toy rocket is shot vertically upward from the ground. Its distance in feet from the ground in 5 seconds is given by s(t) = -16t2 + 169t. At what time or times will the ball be 162 ft. from the ground? Round your
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P9/M4- Determination of Abstract: The aim of this experiment was to find out which alcohol burner was the most efficient when heating up water. The different alcohol burners were placed under cans full of 100cm3 of water one after the other. There was a thermometer placed in the can‚ which measured the temperature change during the experiment. It was noticeable that the most efficient alcohol burner was Octan-1-ol as its average was 16.4KJ whilst most other burners were less than 10KJ.
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