Pre Lab: Background: The Density of a material may be determined by determining the mass and volume of a sample material and calculating the mass/volume ratio. An independent variable is the variable that is being manipulated or changed during the experiment. The dependent variable is the variable that is being measured. The independent variable for this experiment is the copper because you are only changing the amount of copper you use. The dependent variable is the density because we are measuring
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1.1 Chemistry A. What Is Chemistry? * Because living and non-living things are made of matter‚ chemistry affects all aspects of life and most natural events. * Matter- is anything that has mass and occupies space. * Chemistry- is the study of the composition of matter and the changes that matter undergoes. B. Areas of Study * Five traditional areas of study are organic chemistry‚ inorganic chemistry‚ biochemistry‚ analytical chemistry‚ and physical chemistry. * Organic
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Analysis Group Date: December 2009 Group members: Jun Gao Jiaqi Yin Qing Zhang Antoine Vulcain Main issues: Evaluation of two possible products: 1. NPV of two possible products 2. WACC analysis --CPAM --Bond yield plus Recommendation: Product B(aircraft) will be suggested due to the situation of the company. ---If there are enough funds for the company‚ product A is also acceptable Analysis Summary: High Mountain as an technology
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What are the impacts of chemistry on society? In: Biology [Edit categories] Answer: the impacts chemistry have on a society is huge. every single material that we come in contact with‚ in our daily ife is composed of chemicals there are negative and positive effects of chemistry but the negative effect is mainly due to the inability of a man to think carefully first of all lets take the example of drugs. drugs are composed of chemicals ofcourse‚ but these drugs can be used for a good purpose
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Wavelength‚ frequency‚ and amplitude and energy. As a person in science‚ i should know the order of colours in the visible spectrum and the span of visible wavelengths. Question: if light is a .. Answer: max planck proposed that e.m radiation comes in units of defined energy rather than in any arbitrary quantities. Planck called it quantum The Photoelectric Effect Planck’s theories were used to explain a number of observations that had been troubling scientists. Einstein extended
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Competition in school is harmful to the students. As unglamorous as it sounds‚ the purpose of a public education is to prepare the young person to enter the workplace as a fully functional worker. Competition encourages rugged individualists. The workplace needs team players who will cooperatively work together to meet common goals. The workplace does not need a group of stars who will not share the bonus and who work alone rather than working together. The more successful competitor‚ winner‚
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Practice Set- Balancing Reactions Section I - Place the appropriate coefficient on the line in front of each species to balance each equation and then under each equation identify the reaction type. 1. ____ Cu +_______Cl2 ® _________ CuCl 2. _____ H2O ® ______ H2 + _______ O2 3.______ KBr + _______ AgNO3 ® ______ KNO3 + _______ AgBr 4. ______ CH4 + _______O2 ® ________ CO2 + ________ H2O 5._______ Zn + _______ HCl ® ________ H2 + _______ ZnCl2 6. _____Fe + ______ H2O ® _______ Fe3O4 + _______
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Data Collection: Mass of FA1 | Mass of empty weighing bottle and FA1 (±0.001) /g | 5.821 | Mass of empty weighing bottle (±0.001) /g | 4.321 | Mass of FA1 (±0.002) /g | 1.500 | Volume of FA3 prepared = 250.00 ± 0.12 cm3 Volume of FA3 used for titration = 20.00 ± 0.06 cm3 Titration of FA3 against FA2 | | Run 1 | Run 2 | Run 3 | Final volume of FA2 (± 0.05) /cm3 | 25.30 | 25.40 | 25.45 | Initial volume of FA2 (± 0.05) /cm3 | 0.00 | 0.00 | 0.00 | Volume of FA2 used (± 0.10) /cm3
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MATTER AND CHANGE Name _____________________________________ PRACTICE PROBLEMS Period _________________ Date ______________ SECTION 2.1 MATTER 1. Which of the following is not a physical change? a. dissolving sugar in water b. burning gasoline in an engine c. evaporating sea water to obtain salt d. slicing a piece of bread 2. Which of the following is not a property of a gas? a. has a definite shape b. has no definite volume c. assumes the shape of
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Chapter 12 section 1 review 1) what characteristics of gases makes them different from liquids or solids? Gases have particles that are have a greater distance apart from each other than the particles between a solids and a liquid 2) why are gasses considered fluids? Gasses are fluids because they are able to flow 3) what’s happens to gas particles when a gas is compressed? When a gas is compressed it will move gas particles closer and make the volume smaller. 4) what is the
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