Why is the difference between a physical or chemical change?
Why is the difference between a physical or chemical change?
Category: Chemistry
Given for an unknown compound are MS and IR spectra. determine the structure of the compound, provide a fragmentation reaction—meaning mechanism–from the molecular ion giving the base peak, and identify two bands in the IR consistent with your proposed structure .
Identify fragment patterns and IR peaks of the following structure. Relative Intensity 100 – 80 – 60 – 40 – MS-Itd-9540 20 – 0 I II 11111 I I dhirlI 11111 CI 7n 40 o II ‘i 120 140 160 rn/z II I 1 11 1 11 11 1 11 I 180 LULl 1. Given […]
Give the ion symbol for your metal. How many protons and electrons in the charged ion?Give the molecular formula for the ionic compound your metal forms with (a) oxygen (O2) and with (b) chlorine (Cl2)?
Chem 104 Fall 2022 Intro Chem Final Project Metal: 1) How many protons, neutrons and electrons are in the uncharged atom? 2) What is the atomic number of your metal? 3) Give the ion symbol for your metal. How many protons and electrons in the charged ion? 4) Give the molecular formula for the ionic […]
What is the mass flow rate of this stream in kg/min? ,What is the molar flow rate in mol/s?
Q. 3 Liquid acetaldehyde (C₂H₄O) is flowing through a pipe at a rate of 235 m³ /h. (a)What is the mass flow rate of this stream in kg/min? , (b)What is the molar flow rate in mol/s?
Nevertheless, the yield strength of Ni superalloys increases with increasing temperature until close to the alloys’ melting point, as shown in Figure 1.Explain why they behave so uniquely.
1. The anti-phase boundary (APB) strengthening is the main strengthening mechanism for Ni superalloys. What is the APB. How does the APB strengthening happen? (15 points) 2. Ni superalloys are the choice for mechanical structures in space applications at 650~1,100°C because they provide both high strength and good oxidation/corrosion resistance. For the majority of engineering […]
What are the similarity and difference between FCC and HCP crystal structures?What is the atomic packing factor? What are the atomic packing factors of BCC, FCC and HCP? Does the volume increase or decrease when FCC iron changes to BCC iron? Why?
Materials Science HW of ETM 307 Chapter 4 of ETM307: Crystal Structure 80 points in total 1. What are crystalline materials? What are non-crystalline materials 2. What is allotropic? What is polymorphic? 3. What are unit cell, lattice constant and the number of atoms per unit cell? What is the number of atoms of BCC, […]
What is your stand regarding the use of antibiotics and the risk of bacteria outbreaks? Do you think the government should ban the use of antibiotics in animals used for consumption? Explain your answer.
Part I What is your stand regarding the use of antibiotics and the risk of bacteria outbreaks? Do you think the government should ban the use of antibiotics in animals used for consumption? Explain your answer. After watching the second video, explain in your own words the comparison the author makes regarding emission taxes and […]
Write a hypothesis answering the question above. Your hypothesis should include a brief reason for the answer you are espousing. What experiments can offer evidence for the mechanism of a reaction?
We have covered nucleophilic substitution reactions in class. These are extremely important reactions both for synthesis in lab and in biological systems. This lab gives you a chance to carry out a nucleophilic substitution reaction, and a chance to experience how scientists determine the mechanism which governs a reaction. When organic chemistry students attend class, […]
Briefly explain the basic steps of the analytical procedure(s) for each of the methods. Which controls and/or standards were used in this study?
Write/type up a critical analysis of the findings of this paper. Your analysis should address the following questions: What was the purpose/objective of this study? What was the analyte? Which methods were used? Briefly explain the basic steps of the analytical procedure(s) for each of the methods. Which controls and/or standards were used in this […]
Be sure to have first watched the Sodium Carbonate and Hydrochloric Acid Reaction video. Why was the flame extinguished when placed in the neck of the reaction test tube?
E X Fall 2022 Introduction . (-3 Take Test: Lab 5 Chemical Reactions Be sure to have first watched the Sodium Carbonate and Hydrochloric Acid Reaction video. Why was the flame extinguished when placed in the neck of the reaction test tube? (select one) O a. There was no oxygen gas due to the production […]