The purpose of this lab was to determine if a there is a change in mass when a gas is produced and determine if gas has mass. To conduct this experiment‚ the group must be careful not to let the Alka-Seltzer tablet get wet before the bottle is closed by wiping the lip of the bottle and the cap so it remains dry‚ or risk gas escaping into the air and not being captured by the bottle. Also‚ the group must be sure to close the bottle tightly with the cap‚ because gas may escape this way as well. During
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Natural Gas‚ Pollution‚ and Our Environment In today’s society there is a great need for environmental protection. Things that happened during our parents and grandparents age have caused a great concern for our ozone‚ our air‚ and our environment. You constantly hear about the many sources of pollution‚ but we hardly ever hear about the solutions. In this paper I will present one possible solution to the air pollution problem that has been caused by too many automobile emissions being released
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Introduction The purpose of this lab is to determine the percent mass of Cu in a penny and see if the fabricator that makes the planchets for the government is using the correct amounts of Cu in the pennies. The composition of a standard penny is 97.5% Zn and 2.5% Cu. In the lab we will be using Beer’s Law (A=elc+b where A is solution absorbance‚ e is a constant called molar absorbency‚ l is the length in cm‚ and c is the concentration). Using Beer’s Law in this lab a colorimeter is used to find the
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AP BIOLOGY Lab 5 Cellular Respiration Objective: To calculate the rate of CR from the data. To then relate gas production to respiration rate. Then test the rate of CR in germinating versus non-germinating seeds in a controlled experiment and then test the effect of temperature on the rate of CR in the germinating versus non-germinated seeds in a controlled experiment. Analysis: 1. The CR is higher in the germinating peas in the cold water rather than in the beads or non-germinating peas
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Biology 20 IB Design Lab Does increasing or decreasing the ph level of a 3% concentration H2O2 (l) solution affect the amount of oxygen released between 15.0ml of the solution and a 5g sample of liver? The reaction is measured by the difference in mass of a balloon that is used to capture the amount of gas released by the catalase enzyme found in liver reacting with a basified 3% H2O2 (l) and an acidified 3% H2O2 (l) . Chemical reactions occur when two or more molecules interact and the molecules
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October 1‚ 2013 Chemical Reactions of Copper Objective The objective of this lab is to convert copper (Cu0) “in a series of reactions to various compound containing copper as the Cu2+ species” (CHM111 Laboratory Manual) in order to prove the Law of the Conservation of Mass. Introduction In this experiment‚ we took a look at how copper (Cu0) reacts with different substances to get an end result where it is transformed back to its original state. There were five different reactions that involved
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Sample Lab Report: Factors which Affect the Activity of the Enzyme Catalase Purpose: Must include: background information about concepts involved in the lab‚ statement of purpose of the lab identification of independent and dependent variables. A hypothesis is often not necessary or appropriate. Enzymes are proteins that speed up chemical reactions in cells. They break down molecules called substrates. Each enzyme has only one substrate that it breaks down. Enzymes are produced in
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SCIENCE AND ENGINEERING 1. Course Number and Title: CHEM-181 General Chemistry I 2. Semester Hours: 4 Contact Hours: (3 + 2) Lecture Lab 3. Catalog Description This course‚ intended for science majors‚ is the first course of a two-course sequence. Course topics include stoichiometry‚ inorganic nomenclature‚ solutions‚ gas laws‚ thermochemistry‚ atomic structure‚ and chemical bonding. The laboratory work includes basic laboratory techniques and is intended to support lecture
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ATENEO CENTRAL BAR OPERATIONS 2007 Criminal Law SUMMER REVIEWER BOOK I CRIMINAL LAW – A branch of municipal law which defines crimes‚ treats of their nature and provides for their punishment. Characteristics of Criminal Law: 1. General – binding on all persons who reside or sojourn in the Philippines Exceptions: a. Treaty Stipulation b. Laws of Preferential Application c. Principles of Public International Law Ex: i. sovereigns and other chiefs of state ii. Ambassadors‚ ministers plenipotentiary
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Drug: OXYGEN Generic Class of medication: Oxidizing agent (gas) ACTION: Reverses Hypoxia‚ Increases arterial oxygen‚ Increases hemoglobin saturation‚ Increases tissue oxygenation Indications: Hypoxia or anticipated hypoxia‚ or in any medical or trauma patient to improve respiratory efficiency. Contraindications: There are no contraindications to oxygen therapy. Dose: Route: Oral DOSAGE: Adult: 1-6 LPM via NC; 10-15 LPM via
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