Physical and Chemical Changes Say you are presented with two beakers‚ beaker A and beaker B‚ each containing a white‚ powdery compound. * a. From your initial observations‚ you suspect that the two beakers contain the same compound. Describe‚ in general terms‚ some experiments in a laboratory that you could do to help prove or disprove that the beakers contain the same compound. You may try some of the followings: * Dissolving in water * Dissolving in different chemical solution
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Rounding Examples *0.1356 (4 significant figures) -> Round answer to 2 significant figures *0.1356 -> 0.14 *314.705 (6 significant figures) -> Round number to 4 significant figures. *314.705 -> 314.7 *0.0035771 (5 significant figures) -> Round to 3 significant figures. *0.0035771 -> 0.00358 *500‚000 (1 significant figure) -> Write this number to have 3 significant figures. *500‚000 - 5.00 x 10^5 *39.501 -> Round to 2 significant figures. *39‚501 -> 4.0 x 10 *0
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| 1. | | Passing an electric current through a certain substance produces oxygen and sulfur. This substance cannot be a(n) Your Answer: | element. | | | An element cannot be broken down into other elements. | | 2. | | Pick the chemical change that occurs when a lit match is held under a piece of metal. Your Answer: | match burns | | | Chemical changes‚ which release heat and light‚ occur during the combustion process. | | 3. | | Which identification is incorrect for the elements
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well we are going over scientific notation‚ and significant figures C- Well (states the rules for sig figs) Zeros may or may not be significant. They are significant when between nonzero digits‚ and when at the end of a number that includes a decimal point. They are not significant when before the first nonzero digit‚ and when at the end of a number without a decimal point. Now for nonzero digits. All nonzero digits in a number are considered significant. For example 4.013 has four sig figs. 900.2 has
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In the book‚ To Kill a Mockingbird‚ there is a lot of misunderstanding that shows in the society we live in today. An example of this would be the way some people are treated because of what their race is. Also people seem to judge for things that they do not have an facts on. This is shown from the kids point of view because it is showing how it affects the kids the most when misunderstanding like these happen in a society. Misunderstanding is simply when a person takes a certain situation or words
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precise than Andrew’s. b) Brian’s balance is more accurate than Brenda’s. What important characteristics of the four balances are implied by these statements? Give examples. Andrea will be able to read her balance to a greater number of significant figures than Andrew since her balance is more precise. Her successive measurements will also be less variable than Andrew’s measurements. Ex. If three measurements are taken by Andrea (1.7 mL‚ 1.7 mL and 1.8 mL) we know that her spread in measured
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resources and/or products by the target market and recommend how they may be overcome. Finally‚ analyze the role of economic integration in overcoming trade barriers. You should date creatively. You could spend some time home with your friends or significant other and cook a nice dish. This is not only the more impressive option‚ but the cheaper one as well. Strike a deal with your roommates. If they agree to make themselves scarce during your date‚ you will do the same for them. This archive file
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CLOTHES SHOP In the life of everybody all over the world‚ clothing plays an important role in its social class‚ ranking‚ confidence and appeal. Clothes protect us from the weather and provide us with warmth and cover. Clothes also make us are more beautiful and prominent than in the eyes of other people. In our lives‚ the clothes have a huge impact on how others perceive us and how we perceive others. We choose topic about the clothes‚ because we want know importance of the
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Definition of Measurement Measurement is the process or the result of determining the ratio of a physical quantity‚ such as a length‚ time‚ temperature etc.‚ to a unit of measurement‚ such as the meter‚ second or degree Celsius. The science of measurement is called metrology. The English word measurement originates from the Latin mēnsūra and the verb metiri through the Middle French mesure. Reference: http://en.wikipedia.org/wiki/Measurement Measurement Quantities *Basic Fundamental Quantity
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Balance Lab Worksheet Measurement * Measurement is an important skill used for data collection and data analysis. Careful attention to the accuracy and degree of uncertainty of each measuring device is necessary for proper data collection. Significant figures are used to record or report measurements accurately. * This laboratory activity will give you the opportunity to get more familiar with some of the basic measuring devices that are common in chemistry labs. You will use the measurements
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