chaos‚ but the plague definitely contributed towards it‚ as well as making more problems. The Black Death erupted in the Gobi desert in the late 1320’s. There is no real explanation why. The plague bacillus was alive and active long before that. Europe had suffered from an epidemic in the 6th century. But the disease became relatively dormant in the following centuries. It is said that it was due to the climate beginning to cool in the 14th century. Whatever it was‚ the outbreak began and spread
Free Black Death Middle Ages
Analysis of a Chemical Reaction Purpose: To observe a chemical reaction and to use qualitative and quantitative evidence to identify this reaction from among four possibilities. Hypothesis: I think the result is going to produce water. I think this is going to happen because there is hydrogen and oxygen inNaHCO3. Materials: -Test tube clamp - 150 mm test tubes (2) - burner - retort stand - clay triangle - iron ring - crucible Procedure: Part A: 1. Add 0.5 g of NaHCO3
Premium Chemistry Chemical reaction Chlorine
order to gain stability with each other (Larsen). To have stability which each other‚ the atoms share electrons so that their outer electron shell is equal. Ionic bonding is the complete transfer of valence electron(s) between atoms. It is a type of chemical bond that generates two oppositely charged ions (Larsen‚ 2010). Element that have a positive ion are able to bond with elements with negative ions. This is because the elements share the electrons so that the ionization becomes neutral and both atoms
Premium Chemical bond Atom Ionic bond
Education and the Knowledge-Based Economy in Europe EDUCATIONAL FUTURES RETHINKING THEORY AND PRACTICE Volume 24 Series Editors Michael A. Peters University of Illinois at Urbana-Champaign‚ USA J. Freeman-Moir University of Canterbury‚ Christchurch‚ New Zealand Editorial Board Michael Apple‚ University of Wisconsin-Madison‚ USA Miriam David‚ Department of Education‚ Keele University‚ UK Cushla Kapitzke‚ The University of Queensland‚ Elizabeth Kelly‚ DePaul University‚ USA Simon
Premium European Union Discourse analysis Knowledge management
Chemical Reactions Lab Synthesis Reactions: Synthesis reactions occur when two elements or compounds combine to create one single compound. The general equation of synthesis reactions is: A+B→AB. The following are the complete balanced equations for the five synthesis reactions performed in the lab. Reaction 1: Reaction 2: Reaction 3: Reaction 4: Reaction 5: The reaction of CO2 and water is a prime example of a synthesis reaction. This is a synthesis reaction because it follows the general
Premium Chemical reaction Oxygen Single displacement reaction
32 48 13 32 48 14 32 48 Ratio: 48:32=6:4=3:2=1.5 Conclusion: Answer the following questions in complete sentences‚ giving detailed explanations and support for each of your answers. 1. Explain in your own words what it means for a chemical system to be in the state of dynamic equilibrium. After a reaction has occurred for awhile at a given temperature‚ the forward and reverse reaction rate will eventually be equal. Although you may get this confused‚ the concentration may not be
Free Chemical reaction Ratio Chemical equilibrium
Stephany Matos Chem Lab: Chemical Equilibrium Lab 52 Synopsis Iron (III) ions react with thiocyanate ions (SCN-) to form iron (III) thiocyanate‚ FeSCN2+. It is represented in the equation below: Fe3+ (aq) + SCN- (aq) FeSCN2+ (aq) Therefor the equilibrium constant for this reaction is: KC = [FeSCN2+]/([Fe3+]•[SCN-] For this experiment we were able to determine the equilibrium constant KC for this reaction. First we prepared five different mixtures with known initial concentrations of
Premium Chemical equilibrium Chemistry Concentration
Wipro Technologies Europe 1. In my opinion‚ the critical personal characteristics that WIPRO is looking for will make it easier in order to find the Indian context‚ this is because the type of people the company is looking for are people who have sufficient grasp of the abstract‚ tolerance for ambiguity‚ and the patience to be able to grow with them. This will make it easier for them because they just need to find people with this characteristics or if not just train them in order to act like
Premium A Great Way to Care Employment Motivation
Nickel is one of the most important elements on the periodic table. It has plenty of history‚ as well as a huge importance to society. Its has unique chemical‚ physical‚ and geological properties. Nickel is used commercially in abundance‚ as it is used anywhere from simple art products such as ceramics to complex structures such as tubing for desalination plants. It is even used in the American five-cent coin‚ the "nickel".<br><br>Nickel was discovered by Axel Fredrik Cronstedt‚ in Sweden‚ during
Premium
Chemical Formulas Review: Nomenclature and Formula Writing Naming Simple Compounds There are four naming systems you should familiarize yourself with to succeed on the SAT II Chemistry exam. The trick is recognizing which naming system to use. Here are the guidelines: * If the compound starts with H‚ it is an acid. Use the naming acids rules. * If the compound starts with C and contains quite a few H’s and perhaps some O’s‚ it is organic. Use the naming organic compounds rules. *
Premium Ion Ammonia Salt