Determining the value of molar mass of chosen compound Marta Dürrigl 1mmA Chemical reaction: b.) CaCO3 (s) + 2HCl (aq) ----------- CaCl2 (aq) + CO2 (g) + H2O(l) AIM: The aim of this investigation is to experimentally determine the molar mass of carbon dioxide (CO2) by measuring its volume and calculating its mass. CO2 which we will measure will arise as a product of a chemical reaction between Calcium Carbonate (CaCO3) and Hydrochloric acid (HCl) as it is shown in the chemical
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Determining the unknown concentration of HCl via heat of neutralization of a reaction involving strong electrolytes and weak electrolytes. Myeongwon Lee 20522885 Partner: Frank Wong TA: Afsoon CHEM 120L – Earth Science & Chem 149 Section: 004 Tuesday‚ November 26th‚ 2013 Introduction All chemical changes are accompanied by change in energy and this energy is in form of heat. The energy change of a reaction that happens at constant pressure is defined as heat of reaction or enthalpy change and the
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Good Shepherd International School International Baccalaureate Diploma Programme Chemistry HL Lab Report Determining the Candidate Name: Kamalia‚ Ujjwal Candidate Number: 001350-035 of in an Egg Shell Candidate Name: Kamalia‚ Ujjwal Candidate Number: 001350-035 Table of Contents 1. Teacher’s Instruction………………………………………………………………….......2 2. Research Question………………………………………………………………………...2 3. Variables…………………………………………………………………………………..2 4. Principle Used……………………………………………………………………………
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Objective/Question/Problem The objective of this project is to see if an egg will float in salt water. The question is how much salt is needed to be added to the water to make the egg float. The problem is that no one knows how much salt is needed to make an egg float. Hypothesis It will take at least three teaspoons of salt to be added to the water for the egg to float. The reason why I think three teaspoons of salt will need to be added to water for the egg to float is because the egg a density
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Lab Report # 11 By: Andrew 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
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Riley Jefferson Block 7/8 October 8th 2012 Electrostatic Gedanken Lab Group Gamma Objective: The objective of this lab is to determine the charge on a pith ball. Hypothesis: I fully believe that the charge of the pith ball will be positive. The formula I will use to prove this is Coulomb’s Law‚ (Fe=(k*q1*q2) / r²). ‘Fe’ is equal to the electrostatic force between the spheres‚ measured in Newton’s. It is also a vector quantity‚ and it’s in absolute value. Secondly‚ ‘k’ is equal to Coulomb’s
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Genes determine biological sex; assess the extent to which gender is bases on our genes. Although our chromosomal pairing will determine our sex (XX ’’ female and XY ’’ male)‚ this does not necessarily determine one’s gender. Gender is influenced at a pre-natal stage‚ via the release of testosterone from the gonads of an XY foetus. It is this testosterone release that sets in motion the train of events that lead to the eventual release of the other androgens from the pituitary gland. It is
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I. Introduction The purpose of this experiment is to determine the pH values of acids‚ bases‚ and buffers of distilled water and 10.0 buffer using measured concentrations of Sodium hydroxide (NaOH) and/or Hydrochloric acid (HCl). Acid is a compound typically having a bitter taste and capable of nullifying alkalis and releases hydrogen ion when added to a solution‚ or containing an atom that can accept a pair of electrons from a base (McKinley‚ Dean O’Loughlin‚ & Stouter Bidle‚ 2016). Bases are water-soluble
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functions‚ but have not been successful in determining it purpose‚ although they have determined it is not used as a weapon nor is it used to gather food. Toucans primarily feed on fruit while snacking on an occasional lizard or insect. The bodies are compact as the wings are too. Scientists have determined that the wings were built to fly shorter distances than other birds in the rainforest. Toucans are often paired off or travel in small groups. Determining the sex of a toucan has been difficult
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PRODUCTION Unit 62 Television News Nassor Introduction NEWS Formats of TV News Programmes News Determining Factor Entertainment News Coverage Comparison References NEWS
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