CHEMICAL REACTIONS OF COPPER AND PERCENT YIELD Objective To gain familiarity with basic laboratory procedures‚ some chemistry of a typical transition element‚ and the concept of percent yield. Apparatus and Chemicals |0.5 g piece of no. 16 or no. 18 copper wire |evaporating dish | |250 mL beaker (2) |weighing paper | |concentrated HNO3 (4 – 6 mL)
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Common Signs of Mole Problems The mole is a burrowing animal that can cause many problems for homeowners. While they may look similar to a mouse‚ you will not have to worry about them invading your home. Instead‚ they will invade your outdoor space and cause many issues. The following are some of the more common signs of mole problems: Mole Hills If you notice that your lawn suddenly has mounds or heaps of dirt in the middle of it‚ you could have a mole problem. The moles will actually mound
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Mole Project Mole S‘Mole... What‘s is it all about 1.Find and record two definition of mole wich are science related? Definition 1: a chemical mass unit‚ defined to be 6.022 x 1023 molecules‚ atoms‚ or some other unit. The mass of a mole is the gram formula mass of a substance. Definition 2: A small congenital growth on the human skin‚ usually slightly raised and dark and sometimes hairy‚ especially a pigmented nevus. 2.Wich of these moles are studied in Chemistry? The first of the two
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Name: Yaissa Fernandez 4.05: Chemical Reactions Data and Observations: Complete a data table that includes a prediction of reaction type‚ observations‚ and identification of reaction type for each reaction in the lab. (10 points) Reactants Prediction of Reaction type Observations Reaction Type Iron (III) and Copper (II) Sulfate Solution Single replacement Solids stay concentrated at the bottom Single replacement Lead (II) Nitrate and Potassium Iodide Solutions Double replacement Yellow powder
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Rates of Chemical Reaction II Pre-Lab Summary: First we will set up the experiment as shown in Figure 2‚ and then we will fill the trough with room temperature water and record the temperature and we will also add the room temperature water to the buret until it is about 10ml from the top. If there are no leaks in the apparatus‚ we will add 10ml of KI to 15ml of distilled water in a 125ml flask. We will swirl the flask so that it achieves room temperature‚ then we will add 5ml of H2O2 and quickly
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Worksheet: Mixed Problems—Mole/Mole and Mole/Mass Name______________ Answer each of the following questions using the equation provided. BE SURE TO BALANCE EACH EQUATION BEFORE SOLVING ANY PROBLEMS. SHOW ALL WORK. 1. ___Cu + ___O2 ___CuO a. If 101 grams of copper is used‚ how many moles of copper (II) oxide will be formed? b. If 5.25 moles of copper are used‚ how many moles of oxygen must also be used? c. If 78.2 grams of oxygen react with copper‚ how many moles of copper (II) oxide will
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In the chapter “Chemical reactions” from the book Saying yes in defense of drug use. It compares Muslim and Mormon Religion restrictions of substances that are acceptable for use outside of these religions. The chapter focuses on alcohol and caffeine‚ but there are other substances that are mentioned as forbidden. Alcohol and caffeine highly addictive yet they are widely available for purchase in stores however the substances are viewed as illicit substances. In the Muslim tradition‚any intoxicant
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The progress of the reaction was monitored in my case using two TLC plate. It first started off with the spotting of Standard benzoin and benzil which were provided in the lab and followed by the addition of the reaction mixture at once it starts changing colour/boiling‚ then at 10 and 20 mins into the reflux. Once all the necessary steps were spotted‚ the TLC plate was placed in in a beaker containing CH₂Cl₂(methylene chloride)‚ which was used as the developing solvent in this experiment. To check
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AKS Review: Moles AKS Correlation 9c. Apply concepts of the mole and Avogadro’s number to conceptualize and calculate: -empirical/molecular formulas -mass‚ moles‚ and molecules relationships In all calculations that follow‚ SHOW ALL WORK AND USE SIGNIFICANT FIGURES. 1. Write Avogadro’s number in standard and in scientific notation. 2. What is a mole? 3. (a) In your own words‚ what is molar mass? (b) Find the molar mass of the following: Fe
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group of four reactions‚ Iron phosphate and calcium phosphate are the two products that are insoluble in water. In the three of the four reactions a cloudy white or yellow formed. This indicated the formation of a precipitate‚ caused by the generally insoluble phosphate anion. Potassium chloride‚ Iron nitrate‚ and potassium sulfate where the products which were soluble in water. With these products there was no evidence of a precipitate forming. 2. Based on the results from reactions A and B for
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