Hoitt CHEM 105 Lab 11/29/2012 Lab # 11 – Acid - Base Titration Introduction: The purpose of this lab is to determine the molarity (M) of an unknown HCl solution. A NaOH solution will be made and its molarity calculated. A sample of the NaOH solution will be titrated against the unknown HCl solution to calculated the volume needed to neutralize it. With these volumes the unknown molarity can be calculated. Theory: Solutions are made up of solvents and solutes
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CHAPTER 3 Response surface methodology 3.1 Introduction Response surface methodology (RSM) is a collection of mathematical and statistical techniques for empirical model building. By careful design of experiments‚ the objective is to optimize a response (output variable) which is influenced by several independent variables (input variables). An experiment is a series of tests‚ called runs‚ in which changes are made in the input variables in order to identify the reasons for changes in
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Question 1 Surface level diversity Surface level diversity are those differences that are easily noticeable such as age‚ gender‚ ethnicity/race‚ culture‚ language‚ disability etc. Surface level diversity is easy to be measured and managers/recruiters can fall into the wrong practice of discrimination based on these factors. For example‚ thinking that performance degrades with age‚ they might prefer younger workforce. Surface level diversity is often difficult to change. For e.g. racial differences
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Graphs‚ Groups and Surfaces 1 Introduction In this paper‚ we will discuss the interactions among graphs‚ groups and surfaces. For any given graph‚ we know that there is an automorphism group associated with it. On the other hand‚ for any group‚ we could associate with it a graph representation‚ namely a Cayley graph of presentations of the group. We will first describe such a correspondence. Also‚ a graph is always embeddable in some surface. So we will then focus on properties of graphs
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equilibrium”‚ whatever the temperature may be. The larger the surface area‚ means there can be more “paths” from the sides of the body that are capable of releasing this heat particles‚ and reaching thermal equilibrium faster. This is what happens when a hotter body is subjected to a colder one. Research Question: How does the surface area to volume ratio affect heat loss in organisms? Hypothesis: I hypothesize that the larger the surface area to volume ratio‚ the more heat will be lost and vice
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2. Preparation Of 1 M Na2CO3 Molecular mass of Na2CO3 = 106g Mass of salt in 100 ml of 1M solution = 10.6g Weighing of salt using electrical balance * Mass of Na2CO3 + beaker = 78.64g * Mass of beaker = 68.04g * Mass of Na2CO3 = 10.6g 1. 10.6g of Na2CO3 was weighed in a dry beaker. Small amount of distilled water was added and the salt was dissolved. 2. The contents of the beaker were transferred to
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light intensity onto the leaf’s surface and the surface area of the leaf. Hypothesis I think the light intensity could affect the surface area in the following way: ·A higher light intensity could make the surface area of the leaf larger. The reason I think a higher light intensity could make the surface area larger is the fact that there would be a larger amount of chlorophyll‚ containing chloroplasts‚ for photosynthesis. By having leaves of a larger surface area‚ there would be a much more efficient
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Chemistry 3 Lecture 5 CALCIUM HOMEOSTASIS AND HORMONAL REGULATION Roles of Calcium Signal transduction pathways àacts as a second messenger‚ in neurotransmitter release from neurons Contraction of all muscle cell types Fertilization Enzyme cofactor àblood-clotting cascade Proper bone formation PRINCIPAL ORGANS INVOLVED IN CALCIUM HOMEOSTASIS Small Intestines Bones (Skeletal System) Kidneys Normal Total Calcium: 2.2-2.6 mmol/L (9-10.5 mg/dL) Normal Ionized Calcium: 1.1-1.4 mmol/L
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gravity and the type of surface was tested through a series of experiments. In lab 4.1‚ the force of gravity was tested through various surface types‚ including: tabletop‚ waxed paper‚ paper towel‚ fine sandpaper‚ and coarse sand paper. In lab 4.2‚ two different surface types that were tested included: tabletop and coarse sand paper. This lab compared the two averages between both tabletop and coarse sandpaper using different amounts of blocks. In lab 4.3‚ the surface area of the blocks sliding across
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Just below the surface The story is written by Kate Nivison and takes place in a London suburb in an upper class environment (p. 41‚ l. 14) in modern time (p. 42‚ l. 23). It is a first person narrator so we sympathize with Indrani. Indrani: * Is an Indian woman (p. 42‚ l. 37) * Is education‚ but not highly educated * She is very bigoted (p. 42‚ p. 29-30) * She thinks the British people are xenophobic (the woman in the shop and the men from the council‚ p. 43‚ l. 15) *
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