School of Engineering‚ IT and Allied Health Sciences (SOEITAHS) Foundation In Science Chemistry I (FSC 1114) Instructor Email Credit Hours Class Contact Independent Self-Learning Prerequisite Consultation Hours : : : : : : : Leong Shi Qi‚ Grace sqleong@segi.edu.my 4 4 Hours (2 Hours Lecture + 2 Hour Tutorial) 42 Hours N/A Every Wednesday (01:00pm-04:00pm) (Subject to pre-arrangement only) COURSE OBJECTIVE The course will provide students with the adequate knowledge
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4B Composition Stoichiometry Problems Mole Relationship from Chemical Formulas: a) Determine the number of moles of chloride ions in 2.53 mol ZnCl2. b) Calculate the number of moles of each element in 1.25 mol glucose (C6H12O6). c) How many molecules of oxygen atoms are present in 5.00 mol diphosphorus pentoxide? d) Calculate the number of moles of hydrogen atoms in 11.5 mol water. e) A sample of ethanol (C2H5OH) has a mass of 45.6 g.How many carbon atoms does the sample contain?How many hydrogen
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What is molar mass?Molar mass is the weight of one mole (or 6.02 x 1023 molecules) of any chemical compounds. Molar masses of common chemical compounds that you might find in the chemistry laboratory can range between 18 grams/mole for compounds like water to hundreds of grams per mole for more complex chemical compounds.The lightest possible chemical that one can have under normal conditions is hydrogen gas‚ or H2. There is no limit to how heavy a chemical compound can be - it is not uncommon for macromolecules (large
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Pre Lab 1a. Hydrated compound: ionic compound which contain water molecules inside their crystal lattice. The water is not chemically bonded to the crystal in any way and can be extracted by heating the compound. 1b. Anhydrous compound: a compound without water. 2a. The dot means that there are water molecules present in the crystal lattice in a specific ratio. 2b. For every mole of copper sulfate‚ there are five moles of water. 2c. The molar mass of copper (II) sulfate is 159.61 grams/mol
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Introduction Matter is described as anything that has mass and occupies space. Every matter is compose of different substances. There are a lot of substances that exist on planet. That is why chemists use some sort of classification in which each substance would fit into their discrete groupings. Chemist use bonding types‚ electrical conductivity‚ melting and boiling point and physical properties to classify substances into four main groups‚ which are: • Metallic substances • Ionic compounds
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Extraction of DNA Science Fair Project 2013-2014 Produced by Nadia Walker Due Date: Monday January 20th 2014 Presented to Mr. Freimann Date Submitted: Monday January 20th 2014 Table of Contents Introduction page 1 Hypothesis and materials
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CHM 101- CHPT 8 Study Questions 1. O-H bond in water is polar because…………… 2. In liquids‚ the strength of the intermolecular interaction is considered ………. 3. In solution‚ the solvent can be ………………………. 4. A solution is prepared by dissolving 2 g of KCl in 100 g of H2O. In this solution‚ H2O is the ……………………. 5. Oil does not dissolve in water because oil is ……………… 6. What is the concentration‚ in m/v %‚ of a solution prepared from 50. g NaCl and 2.5 L of water
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composition‚ we were able to easily determine this ratio by evaporating the water and then calculating a common ratio. We had Copper sulfate pentahydrous. In our experiment and on further calculations we observed that generally ten molecules of water combine with one molecule of
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22.5% sulfur; 45.1% oxygen ------------------------------------------------- 2) 25.3% copper; 12.9% sulfur; 25.7% oxygen; 36.1% water I. Chemical Formula a. Empirical formula i. the simplest ratio of the atoms present in a molecule or compound ii. lowest number of atoms in a formula * Examples of empirical formula N2H4 = NH2; C6H6= CH 1. Steps: Based on % composition in each element‚ find: i. Mass ii. Mole
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with time and molecular weight. INTRODUCTION Diffusion is the movement of molecules‚ atoms or ions of a substance across a membrane from a region of high concentration to a region of low concentration in a medium. The movement in diffusion is a net movement where any given particle could move in any direction at any particular time until equilibrium is reached (Morgan et al.‚ 1969). At equilibrium‚ molecules continue to move back and forth but the net change on either sides of the membrane
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