variety of chemical and physical methods to determine molecular masses. One of these methods includes the Dumas method for determining the molecular weight of a volatile liquid. This method‚ which was proposed by John Dumas in 1826‚ makes use of a volatile liquid (vaporizes at a relatively low temperature) and allows this liquid to be heated in a water bath to a known temperature and escape from a flask through a tiny opening (Giunta‚ 2003). In this situation‚ vapours are assumed to be obeying the
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b. Solvent: A liquid substance capable of dissolving other substances c. Mixture: a substance consisting of two or more substance mixed together d. Solution: A homogeneous mixture of two or more substances e. Emulsion: a colloid in which both phases are liquids f. Suspension: a mixture in which fine particles are suspended in a fluid where they are supported g. Colloidal dispersion: a colloid that has continuous liquid phase in which a solid is suspended in a liquid. 5. How do
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empty spaces into the middle of these hexagons‚ the ice takes up more space than the same amount of liquid water. The net result is approximately 9% more volume. The disadvantages of this peculiar property are many. For example‚ if a container holding water is made of something rigid‚ like metal or glass‚ will most likely break or crack. This is why pipes can be broken during the winter. If some liquid water gets into a small crack in asphalt‚ concrete‚ or brick‚ the crack will be pushed apart and
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“Hydraulic Fracturing or Fracking is a process in which fractures in rocks below the earth’s surface are opened and widened by injecting chemicals and liquids at high pressure”(Dictionary). This type of mining is used to extract natural gas and oil by drilling a mile or more below the surface. Fracking has been “commercially used for 65 years”(Introduction)‚ supplying Americans energy. Hydraulic Fracturing has allowed for the increase in supplies of oil and natural gas. It is currently the best and
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CHEMISTRY. 1. Evaporation of a liquid can take place a)At its boiling point b) Below its boiling point c) At all temperatures d) At a fixed temperature 2.Evaporation of water will increase with a) addition of a solute to it b) decrease in temperature c) increase in temperature d)less surface area 3.Diffusion is faster in the case of a)Oxygen b) nitrogen c) hydrogen d) Carbon dioxide 4.During evaporation‚ particles of a liquid change to vapours only: a)from the
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used to separate magnetic substances from waste water. Filtration is a technique that will separate a solid that has not yet dissolved in a liquid. Take a mixture of a solid and liquid and run it through a filter‚ the liquid will pass through the filter and you will be left with the sold. The filter has little holes in it that are small enough to only let liquid through. Filtration is not a technique to separate solids‚ separating solids like that is called sifting. Example of filtration includes your
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space‚ has a mass‚ exists in 3 physical states namely solids‚ liquids & gases; composed of particles. Solid: have fixed shape‚ fixed volume. Liquid: takes shape of part of container below liquid level. No fixed shape‚ has fixed volume‚ flow easily. Gas: when collected into vessels occupies all space inside vessel‚ takes shape of container‚ no fixed shape or volume. Arrangement of particles in solids‚ liquids & gases • Attractive force among particles strongest in solid
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Notes • Matter&Material • Matter-everything around you‚ it is anything made of atoms and molecules. It’s anything that has a mass. Matter is related to light and electromagnetic radiation. Usually found in a few forms and it has 5 states- (Solids‚Liquids‚Gases‚Plasmas‚Bose Einstein Condensates) • Mass- It is the amount of material in an object. It is the same on Earth or Mars. It is the amount of matter which an object contains. • Weight- It is how heavy something is. It is a physical property.
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Page 3 Diagram of Kinetic Molecular Theory Page 4 Solids Title Page Page 5 Diagram of Particles Page 6 Characteristics of a Solid Page 7 Pictures of Solids Page 8 Q & A Page 9 Liquids Title Page Page 10 Diagram of Particles Page 11 Characteristics of a Liquid Page 12 Pictures of Liquids Page 13 Q & A Page 14 Gases Title Page Page 15 Diagram of Particles Page 16 Characteristics of a Gas Page 17 Pictures of Gases Page 18 Q & A Page 19 Bibliography Page 20
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2008 Background Information Liquids are all around us. Every day we drink and eat items that contain liquids‚ we use liquids to clean ourselves and our belongings and liquids can even be found in the places that we would not expect‚ like televisions. When someone watches liquid over time‚ an interesting thing begins to happen. The liquid will slowly start to disappear. The formal term for the liquid disappearing is evaporation. According to Asminov‚ Liquids are a state of matter that will take
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