1) At equilibrium‚ __________. A) all chemical reactions have ceased B) the rate constants of the forward and reverse reactions are equal C) the rates of the forward and reverse reactions are equal D) the value of the equilibrium constant is 1 E) the limiting reagent has been consumed 2) Which of the following expressions is the correct equilibrium-constant expression for the reaction below? HF (s) + H2O (l) ⇌ H3O+ (aq) + F- (aq) A) [HF][H2O] / [H3O+][F-] B) 1 /[HF]
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“The Chemistry of Barbecue and You” is an article that creatively talks about the Maillard reaction. The Maillard reaction is a chemical reaction different foods undergo in order to acquire a distinctive flavor or the brownish color. According to the article it was first discovered by a French chemist Louis Camille Maillard who believed the Maillard reaction in foods can help cure diabetes. His assumption was wrong‚ however‚ the Maillard reaction is now known to give food flavor and make it look
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Ch1: Atomic structure Discovering the electron - When electricity flows in an aqueous solution of ionic compounds‚ the metal ions appears at the negative electrode (cathode). - The metal exists in the solution as positively charged particles known as ions. - A 1+ ion plus one unit of electricity gives one metal atom. - Low pressures gases conduct electricity very well. - The glass of containing vessel opposite the cathode (negatives electrode) glowed when the applied potential difference
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NEBOSH PRACTICAL INSPECTION Observations Hazards / Good Practice Control measures Immediate‚ medium‚ long-term actions Timescale (Immediate‚ 1 week‚ etc) (1) Good practice: Adequate lighting‚ ventilation‚ and low background noise levels. Continue the good practice. Ongoing (2) Good practice: Operating manuals were available for some of the work equipments. Immediate: Continue to make the manuals accessible to the relevant employees. Medium: Arrange a suitable place to hold the manuals
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The element of Nickel is number 28 which means it has 28 electrons and 28 protons (this is the atomic number). The atomic mass of Nickel is 58.71 g.mol^-1 which means that there are 30.69334 neutrons since you subtract the number of protons from the atomic mass to get the number of neutrons. The electronegativity of Nickel is 1.8 on the Pauling scale; this is the tendency of Nickel to attract a bonding pair of electrons. The density of Nickel is 8.9 g.com^-3 at 20°C and the melting point is 1454
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Maria Reyes iLab‚ Week #3 ATOMIC WEIGHT OF MAGNESIUM LAB Introduction The purpose of this lab was to determine the atomic weight of magnesium by measuring the amount of hydrogen gas evolved when hydrochloric acid reacted with magnesium. In order to measure the atomic weight I needed to measure the amount of the hydrogen gas that was evolved in reaction to the acid of the magnesium. The reaction used was: Mg + 2HCl --> H2 + Mg2+ (aq) + 2Cl- (aq). The major findings of this experiment were that
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Chemistry has been called the science of what things are. Its intent is the exploration of the nature of the materials that fabricate our physical environment‚ why they hold the different properties that depict them‚ how their atomic structure may be fathomed‚ and how they may be manipulated and changed. Although organic reactions have been conducted by man since the discovery of fire‚ the science of Organic chemistry did not develop until the turn of the eighteenth century‚ mainly in France at
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Chemistry Project on Evaporation of Liquid Acknowledgement I would like to show my gratitude to my Chemistry Teachers Ms Seema More without whose support and encouragement this project could never have have taken the present shape . I would also like to thank my lab incharge Mr. Kakde For helping Me out During The Practical Part Of This Project. Aim Acknowledgment I am are greatly thankful for the cooperation and help from the Community Science Center (CSC) authorities and the Chemistry lab
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Running head: Organic Chemistry Tamanna Ashraf Palm Beach State College Principle of Chemistry Ceravolo‚ Joseph MW 11:00am-12:15pm February 6th‚ 2011 We all are living in a science world. Everything has some kind of reaction going on in our living area. It is just we do not get to see or realize that where n how we having our life much easier than it used to be. In these writing assignments‚ the topic is about the organic chemistry. In organic chemistry‚ we all have different kinds of compounds
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What sort of thing form in chemical reactions? Products are the finished product of a chemical equation‚ and reactants are what make up the products. ( atoms‚ matter‚ molecules‚ energy‚ rate‚ temperature) Name some compounds: H2O (Hydrogen and Oxygen elements - Water) CH4 (Carbon and Hydrogen elements - Methane) NaCl (Sodium Chloride- salt) Different types of compounds: Metal + Metal = Metallic Compound Metal + Non-Metal = Ionic compound Non-Metal + Non-Metal = Covalent compound Different types
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