Chapter 1 Chemical Reactions and Equations Q.1. Why should magnesium ribbon be cleaned before burning in air ? Ans: Magnesium ribbon is a very reactive metal. When stored it reacts with oxygen to form a layer of magnesium oxide on its surface. This layer of magnesium oxide being a stable compound prevents further reaction of magnesium with oxygen. The magnesium is cleaned before burning in air to remove this layer so that the metal can be exposed to air properly. Q.2. Write the balanced
Premium Hydrochloric acid Hydrogen Chlorine
ADVANCED PLACEMENT U.S. HISTORY SYLLABUS [pic] MR. WEATHERFORD PATRIOT HIGH SCHOOL Mr. Weatherford Classroom Phone: (951)361-6500‚ ext. 2064 Email: dan_weatherford@jusd.k12.ca.us p.2 Letter of Introduction August 9‚ 2011. It is a pleasure to welcome you to my class in Advanced Placement U.S. History. This course is offered with the intent of equipping you‚ the student‚ for success not just in this subject area‚ but in life “outside of Patriot High.” Hopefully this
Premium English-language films American Revolution United States
ABSTRACT: the purpose of the experiment was to find out how double displacement happened. When the chemicals and metals were mixed the product was white and the test tube turned very hot. INTRODUCTION: the purpose of this experiment was to identify double displacement and why is happened. Based on background information the chemicals when combined will fizz and turn very hot. Also‚ the chemicals used in this experiment are potentially harmful‚ so make sure to use goggles and tonsils to hold the test
Premium Chemistry Chemical reaction Chlorine
In this story by Connie Jan Maraan‚ the protagonist of the story is a ghost who died when the Tayuman LRT Station suddenly collapsed and the train came falling down on his face. According to him‚ he has seen Christ because of that incident. -Summary provided by: images.1aot.multiply.multiplycontent.com/…/PHIL.LIT%20-… (first entry that appears in Google upon searching Ghost by Connie Jan Maraan) In Connie Jan Maraan’s story entitled “Ghost”‚ she applied various symbols to express what happened
Premium Death Afterlife
STATE OF THE NATION ADDRESS BENIGNO “NOYNOY”AQUINO lll President Benigno s. Aquino lll has just delivered his fourth State of The Nation address (SONA) at the session hall of The House of the Representatives‚ Batasang Pambansa Complex On July 22‚ 2013 Being a candidate and become President is very hard because he need to face and solve all the problems .He need to help people who are needed ‚ he need to response to the few question of people. For him being a president of the country is not
Premium Police Agriculture Philippines
Properties and Reactions of Hydrocarbons Abstract Introduction Hydrocarbons are organic materials that contain only carbon and hydrogen atoms‚ these molecules can be saturated or unsaturated and acyclic‚ cyclic‚ or aromatic. In this experiment we used a variety of methods to examine the physical and chemical properties of hydrocarbons. The first experiment we tested a variety of solvents to see if they dissolved our alkane (Decalin). One would expect that non-polar solvents will dissolve
Premium Solvent Solubility
Biology 104 Reaction Times Objectives: 1. Formulate and test hypotheses regarding reaction times. Introduction: Reaction time is a measure of how quickly an organism can respond to a particular stimulus. Reaction time has been widely studied‚ as its practical implications may be of great consequence‚ e.g. a slower than normal reaction time while driving can have grave results. Many factors have been shown to affect reaction times‚ including age‚ gender‚ physical fitness‚ fatigue‚ distraction
Premium Spinal cord Neuron Nervous system
9/25/13 Endothermic Reaction Lab Report The Effect Ammonium Nitrate has on the Temperature of Water During this lab students are going to mix water and ammonium nitrate one gram at a time and observe the change in temperature that is occurring. The students are then going to record the data on a table and later will be able to make a graph of the results. A hypothesis for this lab could be if ammonium nitrate is added to water then the water temperature will decrease. . Hypothesis: If
Premium Ammonia Thermodynamics Water
Averting your eyes away from something is easier said than done. When we drive down the road and see an accident‚ our natural instinct – as macabre as it may be- is to take a peek at the carnage. The average person will see the accident‚ stare perhaps for a couple more seconds then they should‚ and then continue on with their lives. When we see an accident on the side of the road‚ we may be exposing ourselves to sights or sounds that we would rather not see or hear. When we go on the internet‚ we
Premium Anorexia nervosa Eating disorders Supreme Court of the United States
Aldol In this preparative lab‚ an aldol (trans-p-anisalacetophenone) was produced from the reaction between p-anisaldehyde and acetophenone with the presence sodium hydroxide. The reaction also showed the importance of an enolate and the role it played in the mechanism. Sodium hydroxide acts as a catalyst in this experiment and is chosen because of its basic conditions and pH. The acetophenone carries an alpha hydrogen that has a pKa between 18 and 20. This alpha hydrogen is acidic because of its
Premium Carbonyl Aldehyde