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Also, a chemical reaction was observed when mixing sodium carbonate solution with hydrochloric acid. This was indicated by the evolution of gas bubbles in the reaction and the formation of a precipitate. A change in total mass of the starting materials vs. The final products was noted upon weighing the materials before and after the reaction. This is not a contradiction in the law of conservation of matter (mass). This can be explained by the loss of some matter as a gas, which could then not be weighed on a scale.
Some errors in the experiments did occur. In experimenting with the concept of the law of conservation of matter (mass) some mass was lost when transferring liquids some liquid was spilled. No mass was actually destroyed through the chemical reaction. The loss of spilt liquid erroneously seemed to indicate a change in mass between the starting materials and end products. Also, when taking...
This could be due to not properly zeroing the scale or allowing the scale to come to a full stop on a number to cause differences in weight of less than 0.05 g between the starting materials and final products.
Both physical and chemical changes were observed in this experiment. These changes were observed and showed the typical signs of each type of change that a physical or chemical reaction has occurred. The overall conclusion of this laboratory experiment was that the law of conservation of matter (mass) held true in all of the chemical experiments. Any deviations from the law of conservation of matter (mass) that were observed could be either explained as an error in weighing or spilling liquid or in the fact that matter that was converted into a gas and could not be weighed using a scale.
Chemical Properties of the Universe Astronomers hypothesize that about 5 million years ago, the Solar System was filled with a plethora of hot gases and dust, swirling around a hot core. They think that once the core approached about 1 million degrees, the physics and chemical properties caused the gases to coalesce, forming the sun. During this time, there were millions and millions of asteroids. As these asteroids collided with one
Physical Science Elemental Isotopes and Allotropes The 19th century discovery of the periodic table of the elements by Dmitri Mendeleev gave an organizing principle to understanding the structure of the atom, and deriving atomic weight. On the periodic table, the lighter elements have atomic weights which correspond to whole numbers. Hydrogen has an atomic weight of 1, which corresponds to the idea that it has only one proton (and the weight of
Jurisdiction and Applicable Law The first issue that Barcelo faces concerns which nation's law governs the contractual rights and duties between himself and George. Because this was an international voyage between England and Spain, and because the contract appears to involve English and Spanish parties, the question is whether the parties' rights and remedies are supplied by English or Spanish law. Although maritime law is primarily governed by international treaties
During the 1960's and 1970's, violent contact with the police, resulting in force occurred during anti-war, labor and civil rights demonstrations, during a politically tumultuous time. It is safe to conclude that excessive force was used during these clashes. Deaths and injuries were the results of political clashes at the Republican Convention in Chicago, during campus riots held at several universities, during political demonstrations held in public places and in
Chemical Addiction Progress More Rapidly in Young People than Adults? Chemical dependency is the obsessive use of chemicals like drugs, alcohol, and tobacco and the incapacity to stop using them, in spite of all the troubles caused by their use. People with a chemical dependency can stop using for a while but find it hard to start all together. This is where professional help is needed to stop it for
Interoffice Memorandum of Law Case: Joe Lee Simmons, Appellant v. State of Texas, Appellee Docket number: 01-07-00543-CR Office file number Re: Issue [1] was there evidence of possession of cocaine weighing four or more grams but less than 200 grams given the evidentiary requirements of TEX. CODE CRIM. PROC. § 38.35(d)(1); [2] the validity of a motion to suppress based on the officer's failure to report all offenses committed in his jurisdiction to the