While it is easy to make comparisons between the pupil of the eye and the f-stop of a camera or between the retina of the eye and photographic film‚ once we get past the basic similarities of the optics of the two systems‚ comparisons begin to rapidly break down. The eye is not only much more complex than a camera and its film‚ but the two imaging devices function by different chemical mechanisms. The photographer (or the automatic exposure system of the camera) regulates the f-stop opening and time
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Matter: anything that has mass and takes up space Particle Theory: the scientific statements that summarize about particles of matter 1. All matter is made up of particles that contain spaces between each particle 2. Different substances are made up of different types of particles 3. Particles are always in constant motion 4. The movement of particles will increase if temperature rises 5. Particles are attracted to each other Pure substance: a substance that consists of only 1 type of particle
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Apple‚ a Socially Responsible Corporation It is no mystery that companies exist and desire to make a profit from their product or service being offered. However‚ it is becoming increasing popular that companies desire to achieve social responsibility in order to increase their public image‚ which in turn should lead to increased profits. In this class‚ we learned that social responsibility is the duty to take an action that will benefit the interests of society and the organization (Kinicki &
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The endocrine system is very dynamic and has ties to most‚ if not all of the other major systems of the body. It is responsible for production of hormones and the regulation of them as well. These hormones act as chemical messengers within the body. Through several differing mechanisms‚ they are able to trigger very specific responses in target cells or organs. This is what enables the endocrine system to guide growth‚ development‚ reproduction‚ and behavior‚ among many others as well.
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represent a compound. a) symbol b) equation c) subscript d) formula 2. ___ atoms or groups of atoms are called ions. a) charged b) diatomic c) neutral d) monatomic A 3. For the formula of a compound to be correct‚ the algebraic addition of the charges on the atoms or ions in the compound must add up to __. a) zero b) one c) two d) four D 4. Potassium bromide is an example of a(n) __ compound. a) molecular b) organic c) polyatomic B d) ionic 5. The only common
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Chemistry Equipment Symbols 1. Test Tube 2. Boiling Tube 3. Beaker 4. Conical Flask 5. Test Tube Holder/ Tongs /Clamp Stand 6. Measuring/Graduating 7. Funnel 8. Pipette Cylinder 9. Spatula 10. Tripod 11. Bunsen Burner 12. Glass Bulb 13. Burette 16. Condenser Pipette Changes of State Filtering Solutions 03-Nov
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byproducts‚ nor does it cause any significant increase in assimilable organic carbon (AOC). Research has confirmed that UV effectiveness is relatively insensitive to temperature and pH differences. In addition‚ researchers found that UV application does not convert nitrates to nitrites‚ or bromide to bromines or bromates. Recent pilot studies show that UV-treated drinking water inhibits bacterial growth and replication in the distribution system; however‚ conditions within distribution systems‚ such as
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Mass Spectrometry MS Interpretation General Interpretation Strategies i Wherever you see this symbol‚ it is important to access the on-line course as there is interactive material that cannot be fully shown in this reference manual. Aims and Objectives Aims and Objectives Aims • Introduces students to the principles of mass spectral interpretation. • Present fundamental concepts regarding mass spectral interpretation Objectives At the end of this Section you should be able to: •
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w w w e tr .X m eP e ap UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education .c rs om *2925136620* CHEMISTRY Paper 3 (Extended) 0620/33 May/June 2012 1 hour 15 minutes Candidates answer on the Question Paper. No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Write your Centre number‚ candidate number and name on all the work you hand in. Write in dark blue or black pen. You may use a pencil for any diagrams‚ graphs
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NH4Cl M= 53.50 g/mol 3.75 x 1024 atoms H x 1 molecule x 1 mol x 53.50 g = 83.3g 4 atoms H 6.02 x 1023 molec 1 mol How many molecules in a) 7.56 g of bromine gas. 7.56 g x 1 mol x 6.02 x 1023 molecules = 2.85 x 1022 molecules 159.80 g 1 mol b) 88.55g of carbon monoxide gas. 88.55 g x 1 mol x 6.02 x1023 molecules = 1.90 x
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