CHEM 1105 Experiment 4: Determination of a Chemical Formula Introduction When atoms of one element combine with those of another‚ the combining ratio is typically an integer or a simple fraction. The simplest formula of a compound expresses that atom ratio. When two or more elements are present in a compound‚ the formula still indicates the atom ratio. To find the formula of a compound we need to find the mass of each of the elements in a weighed sample of that compound. For example‚
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utilize ‘least privilege’ on a daily basis. Believe the idea is to limit security rights and only grant higher level access when necessary to limit accidental and intentioned damaging activity. The latest Microsoft and Apple operating systems do prompt you for administrative rights when changing a configuration or installing software. In the open source world you would have to be granted sudo privileges to the root account when configuring or installing. At my workplace‚ I have seen many examples
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Assignment Unit Test‚ Part 2: Polynomials and Power Functions Answer the questions and show your work. When you are finished‚ submit this assignment to your teacher through the appropriate dropbox basket. (3 pts) 1.) Factor 100x^2 – 49 to factor‚ use the difference of squares formula‚ because both the terms are perfect squares the difference of squares formula is a^2 – b^2 = (a-b)(a+b) therefore 100x^2 – 49 = (10x)^2 – 7^2 = (10x – 7)(10x +7) (5 pts) 2.) Solve x^2 – 11x = -30 (x^2
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Keh Keh September‚ 14‚ 2011 My Least Favorite Relative My least favorite relative is my aunt. When I lived in Burma I used to be good friends with my cousin. We used to hang out during the school time. I liked her but I didn’t like her mother. They are rich people and they discriminate against the poor people. In the beginning we liked each other very much until I went to her birthday party. After that I felt that I didn’t like her very much
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The Most Popular Tourist Attractions in Europe There are many tourist attractions in Europe and has had a very long history. Many countries such as France‚ England‚ Germany‚ Switzerland‚ Spain‚ Italy‚ and Amsterdam all have these very popular attractions. There is a vast history of tourism around the world‚ especially in Europe. There are writings of Herodotus‚ a historian who lived in the fifth century BC. He traveled by sea to Egypt‚ Persia‚ Sicily‚ and Babylon Travel writing is thus an activity
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or her into another one‚ could lead to a state of frustration and pain resulted from the clash of values that attacks him or her entity and social status. Such impacts of the cultural encounter are revealed in the short story “One out of Many” by V.S. Naipaul. Naipaul’s short story shows a clear notion of the cultural encounter. It is a story about an Indian who left his country and went to the United States of America; specifically to Washington. From this point‚ the
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Molecular Formula | Key Concepts * Empirical Formula of a compound shows the ratio of elements present in a compound. * Molecular Formula of a compound shows how many atoms of each element are present in a molecule of the compound. * The empirical formula mass of a compound refers to the sum of the atomic masses of the elements present in the empirical formula. * The Molecular Mass (formula mass‚ formula weight or molecular weight) of a compound is a multiple of the empirical formula mass.
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weight. The law of mass conservation states that mass can neither be created nor destroyed. In this experiment‚ the mass of the metal was not destroyed or created; the metal’s mass was simply changed into a compound form once the gas reacted to it. The net mass of the reactant side of the equation and the product side of the equation should be equal if the experiment is done correctly. The molecular formula represents the number of all elements in a compound. The empirical
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0.Disadvantages of online games Nowadays‚ online games are famous. People prefer to play online games during their leisure time. They are attracted by high resolution of graphic‚ story plots‚ and accessibility of the games. These features would definitely amuse them. But‚ there are lots of disadvantages of online games. Playing online games is a waste if time‚ You may say‚ "Playing online games is an entertainment." Yes‚ I agree with you‚ but‚ most of the online gamers would spend a plenty of
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Generic formulas in film are a certain plot that you can predict what is going to happen because it happens in every movie in the same genre. For an example in a horror movie‚ the viewer usually knows one person is going to die and then another and then another. The last person to die is the female. This is a generic example. From the movie “True Grit” we can see another example of generic formulas. When the little girl suggest that she goes with the old man ‚ even though the old man does not
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