example of a compound because it is one of many compounds that consist of molecules. The hydrogen and oxygen molecules are chemically bonded to form a water molecule. Properties and Changes in Matter Every substance‚ whether an element or compound‚ has characteristic properties. Chemists use these properties to distinguish different substances and then use their knowledge of characteristics to separate them. A property may be a characteristic that defines an entire group of substances. That property
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Department of Chemistry Physical and Chemical Properties Submitted by: Date Submitted: 2/2/2014 Date Performed: 1 Lab Section: Course Instructor: PURPOSE: To identify chemical and physical change in matter. PROCEDURE: Finding out the physical and chemical change in matter. There was seven different substances that were being tested; Mossy Zinc (Zn)‚ Magnesium (Mn)‚ Copper (Cu)‚ Magnesium Oxide (MgO)‚ Copper II Nitrate (Cu(NO3)2)‚ Copper II Carbonate (CuCO3) and Sodium Chloride
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(a+b+c)2+(a-b+c)2+(a+b-c)2 Q 8 The polynomial p(x) = 3x2-5x+k and q(x)=2x3-6x2+5k-3 ‚when divided by (x+2) leave remainder r1 and r2 respectively. Find the value of k‚ if r1=r2. Q 9 Find the value of 27x3 +8y3‚if 3x+2y =20 and xy =14/9 Q 10 If ax3+bx2+x-6 has x+2 as a factor and leaves remainder 4 when divided by x-2. Find the value of a and b. Q 11 If (x+5) is a factor of x3+2x2-13x +10‚ find the other factor. Q 12 Factorise x3-2x2-5x+6 Q 13 x-k2 is a factor of x2-k2x +k-3‚ find the value of k Q 14
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Observations of Chemical and Physical Changes Hands-On Labs‚ Inc. Version 42-0182-00-03 Abstract: Observations: Exercise 1: Observations of a Chemical Change Data Table 1. Chemical Reactions. Well Chemical #1 (4 drops) Chemical #2 (4 drops) Observations: Chemical Change (Y/N) A1 NaHCO3 Sodium Bicarbonate HCl Hydrochloric Acid A2 NaOCl Sodium Hypochlorite KI Potassium Iodide Observation 1: + Add 2 drops of starch Observation 2: A3 KI Potassium Iodide Pb(NO3)2 Lead Nitrate
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NATURAL WATERS] Weathering Reaction In Rocky Mountains Thursday‚ December 6th‚ 2012 BIOL-4060 Abstract: Our planet continues to be influenced by geological processes which help make the way look it is today‚ some of these account for weathering. Weathering is essentially the breakdown of rocks‚ soils and minerals in water and land through interaction with the Earth’s atmosphere. Weathering occurs by means of two processes‚ physical and chemical. Chemical weathering involves atmospheric
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THE CHEMICAL EARTH: 1. The living and nonliving components of the Earth contain mixtures ● Construct word and balanced formulae equations of chemical reactions as they are encountered Reactants → products Chemical reaction: the way atoms are joined changes‚ atoms are not created nor destroyed‚ but are rearranged Indicators: emission of light or heat‚ odour formation of a gas formation of a precipitate colour change change in state aqueous = dissolved in water‚ an aqueous solution
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Performed: 02/05/2013 Submitted: 02/06/2013 Section 1: Title Physical and Chemical Properties Section 2: Purpose This labs is intended to help me investigate chemical and physical properties of pure substances. Section 3: Procedure In this experiment‚ I observed substances in their natural state‚ and recorded their apparent physical properties. I then tested the substances to determine how they react when their natural environments were altered. The pure substances were tested to see
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Patrick Kelly 10/16/12 Physical and Chemical Changes Lab Question: How do you distinguish a physical and chemical change? Hypothesis: If we use these materials and use magnets‚ water‚ burners‚ and filters on the mixtures and elements given we should determine what kind of effect these materials given will have on these mixtures and elements‚ physical or chemical. Procedures: -Part A: Record all observations of Part A in Data Table 1 1. Label each substance on seven pieces of paper
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Experiment #1 Title: Physical and chemical changes‚ and measurements in the metric system Name: Goh Kian Shen Lecturer: Dr. Anne Kee Hooi Ling Section: Chemistry 107A Date lab was performed: 17 January 2013 Aim: The aim of the experiment is to understand physical and chemical changes of different
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November 28‚ 2014 ! ! Physical and Chemical Properties! Purpose/Hypothesis:! • The purpose of this experiment is to investigate the chemical and physical properties of pure chemical substances. A property of a substance is some distinguishing characteristic. Some of the most common physical properties are color‚ odor‚ hardness‚ density‚ melting point‚ boiling point‚ and solubility in various solvents. For all of these properties‚ no chemical change takes place. Chemical properties describe the
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