BALANCE LAB Introduction The purpose of this lab is to become familiar with how to use the ChemLab program for determining mass using both the centigram balance and the electronic balance. Using the centigram balance‚ the mass‚ in grams‚ of a copper slug will be determined by both direct weighing and weighing by difference techniques. Using an electronic balance‚ the wight of a copper slug will be determined by also utilizing direct weighing and weighing by difference. Average mass of a
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commonly found in households around the world. It also is one of the least expensive and most useful drugs in the market. A Chemist named Felix Hoffmann first synthesized aspirin‚ otherwise known as acetylsalicylic acid‚ in 1897 from salicylic acid.1 Salicylic acid is a naturally formed substance. For example‚ willow trees have been recognized since ancient times as a natural source. Salicylic acid is found mainly in the willow’s leaves and bark. The pure acid possesses several useful medicinal
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I. Grade Level/Unit Number: 9-12 Unit 7 II: Unit Title: Mole Concept III. Unit Length: 7 days (on a 90 min. per day block schedule) IV. Major Learning Outcomes: Students should be able to: Mole Concept • Calculate formula mass. • Convert representative particles to moles and moles to representative particles. (Representative particles are atoms‚ molecules‚ formula units‚ and ions.) • Convert mass of atoms‚ molecules‚ and compounds to moles and moles of atoms
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KEY: ABE Lab 1: Prelab: Page A17‚ Questions 1 and 2: 1. What does the term genetic disease mean? What examples of generic diseases do you know about? A genetic disease is a disease caused by an absent of defective gene in the DNA. Students may know of sickle cell anemia‚ which is a disease resulting from defective red blood cells; treatment of sickle cell anemia focuses primarily on relieving pain and controlling infections and other complications that may occur. 2. Adding human DNA to bacteria
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Lecture 7 Intermolecular Force Semester 1: 2014-2015 Instructor Teach Assistants Office Office hours 1 Huynh Kim Lam : Dr. Huỳnh Kim Lâm : Ms. Võ Diệu Ánh Dương Ms. Hồ Như Ngọc : Rm. A1.705 : 9:00-11:00 AM‚ Thursday (LKH) Chemistry for Engineers (CH011IU) - Lecture 7 - Semester 1: 2014-2015 huynhkimlam.iu@gmail.com / lamhuynh.info Molecular forces Intramolecular forces (bonding forces) – exist within each molecule – influence the chemical properties of the substance – are relatively strong
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MBK – Lab Report Name: ____ Section: ___ Module 1‚ Experiment 1: Observing Bacteria and Blood (No microscope needed for this lab) Questions: A. List the following parts of the microscope‚ AND Briefly describe the function of each part. A. Eyepiece – transmits and magnifies the image from the objective lens to the eye. B. Main tube – moves vertically for focusing C. Nosepiece– holds the objective lenses and rotates them. D. Objective lens - Objective lenses provide
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Chemistry SL Internal Assessment: Enthalpy Change Design Lab Experiment: Reaction of distilled water and solid sodium hydroxide RESEARCH QUESTION How does the heat released during the reaction between distilled water and Group 1 elements (lithium‚ sodium and potassium) vary as one goes down the group? OBJECTIVE The objective of the experiment is to measure the heat change during the reactions with minimal heat loss to the surroundings. MATERIALS The materials to be used in this experiment
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1. (10 points) Write out your pre-lab prediction‚ including what evidence or previous knowledge you have to support that prediction. --Answer below: Things "rising" and "setting" give the appearance of something rising or setting. In reality objects like the Sun or Moon aren’t physically rising from the horizon. Most of the motions we see in the sky are caused by the Earth’s motion‚ both its rotation and orbital motion. So all of the "motions" described below are really apparent motions and not
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this lab was to a digital oscilloscope to measure various signals. The goal of Part 1 was to measure the mean value‚ the frequency‚ peak to peak voltage‚ and the RMS voltage of a triangular input signal. To meet this goal‚ a function generator was used to generate a 1 kHz triangular wave signal with a 1 V amplitude‚ and the oscilloscope was used to measure the values of that signal. Using the oscilloscope‚ the mean value was found to be -37.6 mV‚ the RMS Voltage was 292 mV‚ the frequency was 1 kHz
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Chem Final Exam Sample 1 Question 1 of 36 0.0/ 0.0 Points The n = ________ principal shell is the lowest that may contain a d-subshell. A. 4 B. 1 C. 3 D. 2 E. not enough information Question 2 of 36 4.0/ 4.0 Points Which of the following elements has the highest ionization energy? A. Ca B. Al C. Cl D. Ne E. Ba Question 3 of 36 4.0/ 4.0 Points The principal quantum number (n): A. specifies the principal shell of the orbital. B
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