atm? 9. Find the mass in grams of 4.2 L of O2 at STP Kinetic Molecular Theory: 1. List the six postulates of the Kinetic Molecular Theory Attractive Forces Between Molecules: 1. List two intramolecular forces: 2. List three intermolecular forces in order from strongest to weakest. Identify the type(s) of molecules involved with each intermolecular force. Heating Curve of Water: 1. Calculate the amount of heat required to increase the temperature of 150g of ice from -20 oC to 150
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ii) Chemistry is important in health iii) Chemistry is important in clothes Introduction I. Chemistry is the one of the interesting field to learn because many things around us made from chemistry element and we use molecules in chemistry to life. A. Oxygen is the one of molecules in chemistry that are use to breath. B. Water or more popular with H2O use to bath‚ drink and cook. II. According to article of Everyday Chemistry in the World around Us‚ our body contains a chemical compound which
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g A. Ion exchange Chromatography Ion exchange chromatography is a process for separating proteins and other molecules in a solution based on differences in net charge. Ion Exchange Chromatography relies on charge-charge interactions between the proteins in your sample and the charges immobilized on the resin of your choice. Ion exchange chromatography can be subdivided into cation exchange chromatography‚ in which positively charged ions bind to a negatively charged resin; and anion exchange chromatography
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Name Mole Lab Exercises I. Pre Lab Questions Answer the following questions. (Hint: Your textbook will be helpful.) 1. ‘s number is the number of carbon atoms that are present in 12 g of 12C. 2. How many molecules of a compound are in one mole of that compound? 3. Write out the formula for finding percent by mass. 4. Write out the formula for finding Molarity. 5. The Formula Weight of a compound is equal to mole of that compound.
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state of motion of matter it can exist in the form of heat‚ light‚ electric and mechanical energy among others Energy can exist in several forms. Chemical energy is the most common form. The energy is in the chemical bond which unites atoms or molecules to each other. When a new bond is made between two atoms‚ energy is required for its formation and usually in the form of heat although light and electrical energy can be used. When a bond is broken and atoms are released so it energy of that bond
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configurations of azocubane. All properties have been obtained using the B3LYP functional and 6-31G(d‚p) basis set. Also‚ IR‚ UV-Vis‚ CD and NMR spectra of the structures were simulated. The volumes of the structures computed to get the densities of the molecules. All calculations carried out in gas phase at temperature 293.15 k and pressure 1 atm. The simulation results revealed that the trans configuration of azocubane exhibits more stability‚ low reactivity and more detonation property as compared to the
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Ammonia | 90 | 285 | 0.315 | 17.03 | Hydrochloric acid | 60 | 285 | 0.210 | 36.46 | Interpretation of results: The purpose of the glass tube is to eliminate air currents and to let the gas molecules will move on their own. The gas molecules follow a path through the tube as they collide with the air molecules in the tube. Ammonia will diffuses faster because it has a faster rate of diffusion and it is almost twice a light as Hydrochloric acid. A cloud like figure should show up when the gases collide
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number of moles of water present per mole of salt is usually some simple‚ whole number. The formula for a hydrated salt is usually written as MN . x H2O‚ where MN means a salt‚ x indicates the number of water molecules that are associated with one molecule of salt and the dot means that water molecules are rather loosely attached to the salt. In this experiment‚ the mass of the water driven
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burned in air‚ the results are mainly formation of white sodium peroxide‚ Na2O2 and orange potassium superoxide‚ KO2. 2Na (s) + O2 (g) → Na2O2 (s) K (s) + O2 (g) → KO2 (s) Oxygen‚ O2 is more likely to react than nitrogen‚ N2 because the oxygen molecule has partially-filled in the p-orbital diagram. This makes it very reactive due to repulsion energy between the two unpaired electrons. While‚ nitrogen which has a stable structure (half-filled) than oxygen. 3. Small detonations and flames have been
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is written second. Subscripts are small numbers to the lower right of a symbol. They the number of atoms of that element in the compound. Coefficients are large numbers to the left of formulas in chemical equations. They represent the ratio of molecules of each substance involved in a chemical reaction. Weight Percentage is a percentage based on weights. Mole percentage is a percentage based on the numbers of atoms or moles. Formula units is the simplest form of an ionic compound
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