Introduction Silver is a chemical element with atomic number 47 and symbol Ag. It is white‚ soft‚ mallable and ductile metal slightly harder than gold. Silver is extremely flexible‚ this means that it can be converted into both flat sheets and electrical wire. This makes silver is an ideal metal for all kinds of industrial use. Silver occurs in lead‚ Zinc and copper ore deposits. Lead ore is the main source of Silver. In fact‚ 75% of the resources in the world are found in association with other
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1) Calculate the value of the gas law constant R when pressure is in atm‚ volume in Liter and temperature in Kelvin. Given R = 8.314 Jmol‐1K‐1‚ 1 atm = 1 .01325x105 Nm‐2‚ 1m3 = 1000 L J R = 8.314 mol x K = R = 8.314 2 m x mol x K R = 0.082 atm x L mol x K 1.01325 x 10 2 m x mol x K 1 x Nxm = mol x K 3 Nxm 3 Nxm 5 atm Nm-2 x 1000 L 3 m Reporting computed data • Multiplication and Division 5.02 x 89.665 x 0.10 = 45
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6.05 Logan Hotaling Materials Needed: 1. Alka-Seltzer 2. Glass 3. Water 4. Timer Procedure: 1. First you need to fill a glass up with 8oz of water and have it be 25 degrees Celsius. 2. Then you drop the Alka-Seltzer in the water and time how long it takes it to dissolve in the water. 3. Then we need to make the temperature go up then we need to drop the Alka-Seltzer in the water again and see how long it takes it to dissolve with the new temperature. 4. Now
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Chocolate is made from the cacao bean. According to Rodney Lipson‚ “Cacao has been a cultivated crop for at least three thousand years‚ probably quite a bit more. The people who first utilized Cacao were the inhabitants of what is now Venezuela” (Lipson) This group of people would eventually spread the cacao bean in northwestern South America. Cacao was clearly highly valued by these people and they spread it northward through trade with their neighbors. It was probably the Maya‚ over 1500 years
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Curium is highly radioactive. As a metal‚ it is lustrous and silvery. It is malleable‚ chemically reactive and electropositive. Its surface rapidly oxidizes in air‚ gaining a thin film. Most compounds of trivalent curium are stable and faintly yellow or yellow-green. If absorbed in to the body‚ curium accumulates in the bones. Its radiation destroys red blood cell formation. Consequently‚ curium is considered very toxic. Large quantities of curium are now easily made in nuclear reactors. A nuclear
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9/19/2012 Experiment #1-Density Aim: Learn how the process of distillation occurs. Observe how distillation separates alcohol from wine. Method: Distillation is based on the fact that the matter can exist in three phases - - solid‚ liquid and gas. As the temperature of a pure substance is increased‚ it passes through these phases‚ making a transition at a specific temperature from solid to liquid (melting point--mp) and then at a higher temperature from liquid to gas (boiling point--bp). Distillation
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Data and Observations : Part I: Insert a complete data table‚ including appropriate significant figures and units‚ in the space below. Also include any observations you made over the course of Part I. Metal Aluminum Zinc Iron Cooper Mass of metal 27.776 g 41.664 g 34.720 g 41.664 g Volume of water in calorimeter 26.0 mL 26.0 mL 26.0 mL 26.0 mL Initial temp. of water in calorimeter 25.3 degrees C 25.3 degrees C 25.3 degrees C 25.3 degree’s C Temp of hot water and the metal
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From Wikipedia‚ the free encyclopedia For other uses‚ see Instress (disambiguation). Instress is a concept about individuality and uniqueness derived by Gerard Manley Hopkins from the ideas of the medieval philosopher Duns Scotus.[1] [Hopkins] felt that everything in the universe was characterized by what he called inscape‚ the distinctive design that constitutes individual identity. This identity is not static but dynamic. Each being in the universe ’selves‚’ that is‚ enacts its identity. And
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Chem 30A Ch.1-4: Condensed Chang’s Class Notes Chapter 1 Valence electrons octet rule exceptions P and S can have 10 or 12 valence e- B and Al (Group 3) can have 6 valence e- electronegativity- how much an atom wants e- < 0.5 = nonpolar‚ covalent (i.e. H2) 0.5 - 1.9 = polar covalent direction of polarity (using arrow and delta symbol) overall dipole > 1.9 = ionic formation of ions fish-hook arrow Lewis structure formal charge Functional Groups Molecular Shape VSEPR (Valence Shell
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LAB 1 POSTLAB REPORT (65 pts) 1. State the objective(s) of the lab. (5 pts) • To analyze the effects of specific liquids on a variety of materials • To observe potential hazards • To investigate the effects of strong bases‚ strong acids‚ acetone and bleach on a variety of materials which include sugar‚ cotton‚ nylon‚ hair‚ polystyrene‚ egg white‚ egg yolk‚ and aluminum foil. 2. Give a summary of your observations for each of the experiments. (24 pts) Sugar + H2SO4 Black clumped substance
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