A) January 18‚ 2011B) Empirical Formula C) The purpose is to determine the empirical formula of a metallic oxide. D) Pre Lab Questions: After heating the metal‚ the crucible and contents should mass less than it did before it was heated. This is because heating the crucible may rid of other residue that was left in it; bringing it a to a constant mass. A yellow flame will deposit soot on the crucible. This would be a problem because the soot left on the crucible would vary from our constant
Premium Laboratory equipment Magnesium Chemistry
Lab 5: The Integumentary System Name Using the key choices below‚ identify the indicated structures. A. adipose tissue B. venule C. motor nerve D. dermis E. arrector pili muscle F. hair bulb G. merocrine sweat gland H. hypodermis I. apocrine sweat gland J. sebaceous gland 1. D 2. H 3.C 4.J 5.E 6.F 7.I 8.G 9.A 10.B [pic] Using the key choices below‚ choose ALL responses that apply to the following descriptions. A. stratum corneum B. stratum basale C. stratum granulosum
Premium Skin Epidermis
How to Answer 10 Tough Interview Questions There’s no worse feeling than when you’re in an interview and the interviewer asks you a question to which you don’t know the answer. The best way to handle this dreaded debacle is to go into the interview prepared. Familiarize yourself with a few common difficult questions and arm yourself with answers prepared ahead of time. Check out these tough interview questions and some suggested responses in order to avoid an interview disaster: Tough question
Premium Question Interview 2007 singles
Lab Title Waves Lab # 8 Name: Joseph Apap Class: PHY101-14995 Date: 07/11/2015 Purpose: To be able to discuss the sound wave properties of frequency‚ pitch‚ amplitude and loudness. To be able to discuss how the length of a sound wave affects pitch. To be able to explain the use of controlled variables in an experiment. Procedures: Required Materials: Meter Stick 2 Cardboard tubes Scissors Rubber bands Wax paper Transparent tape Flashlight Balloon Small Mirror 1. Hold 1 end of a meter stick down
Premium Sound Chemistry Acoustics
Thermochemistry (((CLASS INFORMATION)) INTRODUCTION Thermal chemistry was intended to display that chemical reaction and phase changes involve energy. The energy of heat was presented when a change in temperature difference was evaluated. Chemical reactions in a calorimeter were used to determine the amount of heat produced by a reaction. Reactions that absorb heat were noted as endothermic‚ and reactions that release heat were noted as exothermic
Premium Chemical reaction Energy Temperature
EXPERIMENT 2: Recrystallization and Melting Point Recrystallization (or Crystallization) is a technique used to purify solids. This procedure relies on the fact that solubility increases as temperature increases (you can dissolve more sugar in hot water than in cold water). As a hot‚ saturated solution cools‚ it becomes supersaturated and the solute precipitates (crystallizes) out. In a recrystallization procedure‚ an impure (crude) solid is dissolved in a hot solvent. As this solution is cooled
Free Solubility Solid Crystal
Figure 2 Figure 3 Figure 1 show the crystallisation reaction when the saturated sodium chloride solution was added to the cool reaction mixture. The salt of p-Toluenesulphonic acid started forming. Figure 2 show the wet crystal after the precipitated salt was being filtered by suction. The wet crystal was light purple in colour. Figure 3 show the end product after drying the wet crystal at 105°C in the drying cabinet (oven)
Premium Chemistry Water Acetic acid
PAGE BEFORE YOU START Laboratory Section: ____________ Partners’ Names: ______________________ Last revised December 15‚ 2014 Grade: _______________________ Experiment 6 Coulomb’s Law - PRELAB 0. Pre-lab Homework (2 points) The pre-lab homework must be handed to the lab TA at the start of the lab. 1. Why is it important to recharge the spheres before each measurement? 2. Consider the function y = xn (for n = -2). Take the natural logarithm of both sides and plot ln(y) vs. ln(x) on the graph below
Premium Harvard University Business school Management
E XPE RIME NT 4 . 5 Reactions of acids Aim To investigate and compare some reactions of a strong acid‚ hydrochloric acid‚ and a weak acid‚ ethanoic acid (common name‚ acetic acid) Equipment Dropper bottles containing: • 0.1 M hydrochloric acid‚ HCl • 0.1 M ethanoic acid (acetic acid)‚ CH3COOH • 0.1 M sodium hydroxide‚ NaOH • 1 M hydrochloric acid‚ HCl • 1 M ethanoic acid (acetic acid)‚ CH3COOH • universal indicator solution • limewater (calcium hydroxide‚ Ca(OH)2) Marble chips (calcium carbonate
Free Carbon dioxide Oxygen Chlorine
Abandoned Acid Mine Drainage at Shoup’s Run Introduction Acid mine drainage (AMD) is an industrial waste which is the result of the extraction process of the mineral coal from the ground. It causes widespread pollution in the streams above and below the coals fields. AMD is caused when water flows through sulfur-bearing materials forming acidic solutions. It is formed when pyrite (FeS2)‚ an iron sulfide‚ is exposed and then reacts with air (O2) and water (H2O) to form sulfuric acid. 2FeS2 (s)
Premium Water Oxygen Carbon dioxide