Properties of Water Water is essential for life as we know it on earth. It is used by plants and animals for basic biological processes which would be impossible without the use of water. The origin of all life can be traced back to the water in the Earth’s precambrien seas. Water is also the universal solvent. It reacts with more elements and compounds than any other substance known to man. Water is a polar molecule made up of on atom of hydrogen and two atoms of oxygen. It is attracted
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LAREDO COMMUNITY COLLEGE Science Department CHEM 1411-1412 Practice Test Ch. 7 Periodic Properties Newton Name Instructions: Circle the letter of the BEST answer(s). Some questions may have multiple answers; be sure to include all correct answers. Each correct question is worth two (2) points. 1) __________ is credited with developing the concept of atomic numbers. A) Lothar Meyer B) Ernest Rutherford C) Michael Faraday
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The man of property Synopsis This episode covers the building of the house to the first moment of Forsyte family crisis. As it opens‚ Soames and Bosinney ride in a horse cart out to Robin Hill‚ where Soames is thinking of building a house. Soames is looking at cheaper sites lower on the hill‚ but Bosinney finds the perfect spot: at the top. The view is lovely‚ and even Soames is moved by it. He takes the site. Irene and June tell Bosinney‚ who’s working on a design‚ about how much they dislike
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Write an explanation of how any two factors affect the rate of an enzyme-controlled reaction. How do these factors affect the chemical structure and properties of the enzyme. Many things can affect the rate of enzyme activity. The temperature of the enzyme‚ the pH of the solution‚ the concentration of the enzyme‚ substrate and the product. Also‚ another affector is the number of competitive and non-competitive inhibitors. As I cannot explain them all‚ I have chosen to explain the effect of temperature
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occurring antimicrobials for food preservation receives increasing attention due to consumer awareness of natural food products and a growing concern of microbial resistance towards conventional preservatives (Schuenzel et al.‚ 2002). Antimicrobial properties of herbs and spices have been recognized and used since ancient times for food preservation and in medicine. Herbs and
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Exercise No. 2 COLLIGATIVE PROPERTIES (Full Report) I. INTRODUCTION Colligative properties In liquid solutions‚ particles are close together and the solute molecules or ions disrupt intermolecular forces between the solvent molecules‚ causing changes in those properties of the solvent that depend in intermolecular attraction. For example‚ the freezing point of a solution is lower than that of the of the pure solvent and the boiling point is higher. Colligative properties of solution are those that
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can we judge Soames by the attitude he adopts towards his wife? Also by her attitude to him. 8. Pick out the epithets that characterize Irene’s dissatisfaction with her married life. 9. Prove that Soames’s feeling for his wife is that of a man of property. Show the means that make it clear that Soames looked upon Irene’s beauty as one of his finest possessions. Give examples and quotations from the text. 10. Why does Galsworthy repeatedly stress the silence of the husband and wife? 11. Analyse the
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Element: Simplest form of matter to have unique chemical properties. Atom: The smallest particles with unique chemical identities. Nucleus: Center of an atom (composed of protons and neutrons). Proton: Have a single positive charge (+1). Neutron: Have no charge. Electron: Tiny particles with a single negative charge and very low mass (-1)/determines chemical bonding properties of an atom. Atomic Number: Number of protons in the nucleus. Atomic Mass: Approximate number of protons and neutrons
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Chapter 6 – Properties of gases lecture notes 1. Gas phase Gases have neither definite shape or volume 1) volume changes with pressure 2) volume changes with temperature 3) gases are miscible 4) gases are generally MUCH less dense than liquids 2. Atmospheric pressure 1 atm = 760 torr (mm of Hg) F= ma F = force m = mass a = acceleration P = F/A - ma/A P = pressure
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crystals from the heavier graupel‚ causing the top region of the cloud to accumulate a positive space charge while the lower level accumulates a negative space charge. Because the concentrated charge within the cloud must exceed the insulating properties of air and this increases proportionally to the distance between the cloud and the ground‚ the proportion of CG strikes (versus cloud-to-cloud (CC) or
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