Environmental Health Sciences Center Community Outreach & Education Program CHROMATOGRAPHY (Adapted from: Forensic Science Activities. University of Colorado Boulder Hughes Initiative. .) DESCRIPTION: Students will use paper chromatography to separate ink molecules and identify the pen used on an unknown sample of handwriting. Students will graph and analyze data they collect using paper chromatography. PURPOSE/GOAL: Students will be able to: • Gain understanding of the purpose of chromatography
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(aq) NH3+ + H+ + Cl- →NH4+ + Cl- NH3+ + H+ → NH4+ H+ + OH- → H2O (l) ∆H= -54.0 kJ/mol NH4++ OH- → NH3+ + H2O (l) (x-1) ∆H=-4.09 kJ/mol (x-1) -54.0+4.09=-49.9 NH3+ + H+ → NH4+ =- 49.9 kJ /mol (-49.9- -26.2)/-49.9 x 100 =47.3% Lab Questions: Pre: 1. The change in thermal content in a reaction 2. The amount of energy needed to change one gram of a substance 1 degree C 3. (50 mL)(1.02 g/mL)(4.18 J/g C)(25.3-21.4) = 830 J 4. 830J+8.20J/g C(25.3-21.4)= 860J 5. .25L(.6mol/1L)+
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Assignment 6: EUP1501 My lists were as follows. The new phone I would purchase should have the following features: Qwerty keyboard‚ MP3 player‚ camera with sufficient megapixels and a zoom in/out option as well as video recorder‚ Wi-Fi connectivity‚ Bluetooth and USB connectivity‚ personal organizer (i.e. alarm‚ reminders‚ calendar)‚ sms and mms. 2. The features for my grandparent’s phone are as follows: Camera with flash‚ calculator‚ large enough buttons‚ big screen (high resolution) and big buttons
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IS4560: hacking and countermeasure Project part 6: defense Plan to prevent attack My defense plan at AHC will include a counter attack from external and internal threats; the vulnerability and security threats that exist inside AHC IT infrastructure. In order the deal with these kinds of threats‚ we will need to train and create and incident report and handling plan with our IT management. I will also help them to create and implement a more secure and dependable Disaster recovery plan that will
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their homes and communities. Thus‚ the domain focuses on teachers’ efforts directed at strengthening the links between school and community activities as these help in the attainment of the curricular objectives. NCBTS DOMAIN 6: COMMUNITY LINKAGES NCBTS DOMAIN 6: COMMUNITY LINKAGES Mar - Elen Fe G. Reñosa‚ SSHT-III Specific Questions for the Teacher: • “Can my students see how the goals and activities in school relate to the values and aspirations in their homes and communities
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tables provided in the introductory comments for Lab #16 VSEPR Theory. Molecular Shape Number of Bonds About Central Atom Shape Description BF3 3 Trigonal planar BeCl2 2 Linear CH4 4 Tetrahedral PF5 5 Trigonal bipyramidal SF6 6 Octahedral C. Valence Shell Pairs: Single Bonds and Non-Bonding electron pairs Fill in the table below for the corresponding compounds. Reference the tables provided in the introductory comments for Lab #16 VSEPR Theory. Molecular Formula Number
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Purpose: the purpose of this part of the lab is to see the effects of enzyme concentration on the reaction rate. Part 2: Effect of Substrate Concentration Purpose: The purpose of this part of the lab was to find the effect of substrate concentration on enzyme activity. Part 3: Effect of Temprature Purpose: The purpose of this part of the lab was to determine the effect of temperature
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above 4. -----------------are used in heating elements‚ precision instruments‚ incandescent lamps‚ and motor starters. (a) Low Resistivity Materials (6) Medium Resistivity Materials (c) High Resistivity Materials (d) None of the above 5. Mercury as a ________ contact material is a metal liquid. (a) an Electric (b) metallic (c) liquid (d) gas 6. -------------- is not a Semiconductor.
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10/24/2013 LAB TITLE: Single Replacement Reaction of Solid Copper with Silver Nitrate PURPOSE The purpose of this lab is to: • Observe a single replacement reaction‚ and • Calculate the mole ratio of silver (Ag) to copper (Cu) in the reaction MATERIALS • Copper wire (30 cm) • Large test tube • 250 ml beaker • Silver nitrate (AgNO3) powder • Dilute AgNO3 solution • Distilled water • Electronic balance • Glass stir rod • Watch glass PRE-LAB DISCUSSION A single
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this catalase lab is to design simple experiments to demonstrate how various factors affect the rate of enzyme activity. This lab shows how the enzyme decomposes in hydrogen peroxide. Methods and Materials Refer to handout attached to the back of lab Observations Table 1: The mL of oxygen produced with increase of catalase 30secs 60secs 90secs 120secs 150secs 180secs Disks: 2 17ml 16ml 21ml 26ml 31ml 35ml Disks: 4 8ml 19ml 27ml 35ml 44ml 53ml Disks: 6 15ml 23ml 32ml
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