Learning Task No. 2: 1ldentify the materials if it a mixture or pure subetance Write your answer in your notebook. Give the reason for your answer a.
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- What is the melting point of the substance modeled by this heating curve? F 150 135 120 D E 105 90 75 C 60 45 30A 15 Heat (kJ) Created by E. Lee for Virtual Virginia (2021) Temp. (°C) BGlass, quartz, and cristobalite have the same chemical formula, SiO2. Given the XRD diffractograms below, what can you say about each of these compounds? Counts SiO2 Glass 4000 - 2000 Quartz 4000 3000 2000 - 1000 Cristobalite 4000 2000 20 30 40 50 Position [2Theta] (Copper (Cu))c. The table below shows characteristics of two dopants added in Czochralski growth processes of crystalline silicon. In both, a mass M of the dopant was added to 1 kg of silicon. Growth 01 Silicon mass Dopant mass Dopant atomic weight (molar mass) Distribution coefficient (ka) 1 kg M 74.9 g/mol 0.3 1.0 x 10¹5 cm- Growth 02 1 kg M 31 g/mol 0.36 Doping concentration 22 As shown in the table above, we got doping of 1.0 x 10¹5 cm3 for the first process (Growth 01), what is the doping concentration that we will get in the second process (Growth 02) ? A) 0.5 x 10¹5 cm-3 B) 2.0 x 10¹5 cm-³ Answer C) 2.9 x 10¹5 cm-3D) 3.4 x 10¹4 cm-3
- Safari 7:34 AM Sun Oct 1 Patterns in Natur...ule 3 assignment 2 Home LE Calibri Bold Italic (E Patterns in Nature Module 3 Assignment 1. Why is glass not a mineral? Insert Draw Layout Review View References BI ●●● U aA 2. Describe several ways in which minerals can form. Directions: Answer each question as thoroughly as possible. Please make sure all of your answers are in your own words. 3. Name two different patterns of crystal growth. Define each one. ili 4. What is a geode? Which type of crystal growth do geodes exhibit? ㅁㅇ =✓ 5. If a mineral is very hard, which type of chemical bonds would that mineral most likely have in its atomic structure, and why? A 19% 0 :Why are units of energy per area (J/m²) used for surface ten-sion values?n to Canvas Part A (23.4813 x 2.52) + 374.99 . View Available Hint(s) ? 407 Submit Previous Answers X Incorrect; Try Again; 4 attempts remaining Part B Part C
- Phase change properties of pure substances Cu C6H12 C (C6H5CH₂)₂0 (CH3CH₂)20 CH3CH₂OH (CH₂OH)2 NH₂COH Au C C6H14 H₂ copper cyclohexane diamond dibenzyl ether diethyl ether ethanol ethylene glycol formamide gold graphite hexane hydrogen 1084.62 6.7 4440 1.8 -116.22 -114.14 -13.0 2.57 1064.18 4489 -95.27 -259.16 2560 80.7 298 34.4 78.24 197.5 217 2836 3825 68.72 -252.879 0.385 1.841 0.51 2.369 2.438 2.394 2.389 0.129 0.709 2.27 14.304 13.26 2.68 -- 7.19 4.931 9.96 8.44 12.55 117.4 13.08 0.12 29.97 45.6 26.52 38.56 50.5 60.2 324 28.85 0.9 280.3 193.7 242 446 -- 234.4 -240.212 40.2 35.9 61.7 80 29.9 12.69Scence Midterm Summ X Material%20Science_Midterm%2 x ewer?url=https://ttu-storage.s3.eu-central-1.amazonaws.com/account 1/attachments/390676/Ma ence Midte 02021.pdf Open with Google Docs 5. Iron has a BCC crystal structure, an atomic radius of 0.124 nm, and an atomic weight of 55.85 g/mol. Compute its theoretical density: 6. Below is a unit cell for a hypothetical metal. (a) To which crystal system does this unit cell belong? 40nm 030 nm 0.30 nm (b) What would this crystal structure be called? 1 1 2 7. Sketch a tetragonal unit cell. and witnin that Page Hocations of the point: DELLGeneral Chemistry 4th Edition McQuarrie • Rock • Gallogly Consider the data in the table. Compound HF University Science Books presented by Macmillan Learning Melting point (°C) AHfus (kJ/mol) Boiling point (°C) AHvap (kJ/mol) -83.11 4.577 19.54 25.18 HCl -114.3 1.991 -84.9 17.53 HBr -86.96 2.406 -67.0 19.27 HI -50.91 2.871 Using the data in the table, calculate ASfus and ASvap for HCl. ASfus = ASvap = -35.38 21.16 Determine the entropy change when 6.10 mol HCl(g) condenses at atmospheric pressure. AS = J/(K. mol) J/(K⚫ mol) J/K
- Use the web to research the elastic modulus and yield strength of carbon fiber composites. How do these materials compare to aluminum, steel, and titanium?What are refractories? How are they classified?. Give examplesfor each type.2- Below information is given for nickel. Atomic weight of Ni: 58.7 g/mol Melting temperature: 1455 °C Enthalpy of melting: 17650 J/mol Density of solid Ni: 8.9 g/cm • Density of liquid Ni: 7.9 g/cm • Icm'atm = 0.1013J b) Draw and explain the P-T diagram of pure nickel.
