naturally occurring elements‚ only 17 of them make up 99.5% of the earth’s crust (including oceans and atmosphere). - In living things (plants‚ animals‚ people) the six most abundant elements are carbon‚ hydrogen‚ oxygen‚ nitrogen‚ phosphorus and sulfur. - The universe is dominated by the elements hydrogen (83%) and helium (16%) 1. The Crust The outside of the earth is a thin crust which is approximately 20 to 40km thick. The crust is a formation of dips and hollows which are filled with water
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each of two small labeled test tubes. Take two more small labeled test tubes and place 4 or 5 drops of your 4-methylcyclohexene product in each of them. Take one tube from each group‚ and count how many drops of the provided bromine in methylene chloride solution it takes before the red color remains upon contact with the liquid sample. Record this information. Test the remaining two liquids in a similar way using the potassium permanganate
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Elements If God has any favorite elements‚ they must be Hydrogen‚ Carbon‚ Nitrogen and Oxygen. These four elements make up the majority of all Biological compounds. Without them‚ life on this planet as we know it could not exist. Due to the bonding possibilities between and among these elements‚ literally millions of organic compounds are possible. Carbon is the backbone of all organic compounds. It forms the main structure of the molecule with Hydrogen‚ Nitrogen‚ Oxygen and occasionally other elements
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alkenes. SAFETY Eye protection must be worn. Concentrated phosphoric acid is corrosive. Mop up spillages immediately with plenty of water. Cyclohexene and cyclohexanol are highly flammable. Keep away from naked flames. Anhydrous calcium chloride is an irritant. PREPARATION 1) Weigh out between 9 and 10 grams of cyclohexanol directly into a 250cm3 round-bottomed‚ quickfit flask. Record accurately the mass of alcohol
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GROUP B MODEL ANSWER Yoshida et al.‚ Flexibility of Hydrogen Bond and Lowering of Symmetry in Proton Conductor‚ Symmetry 2012‚ 4‚ 507-516. DO NOT PLAGIARISE THIS MODEL ANSWER PLAGIARISM FROM ANY SOURCE AUTOMATICALLY LEADS TO A ZERO SCORE Paragraph 1 M3H(XO4)2 compounds are used for electrolytic fuel cells (where M=K‚ Rb ‚Cs; X=S‚ Se). At different temperatures‚ the compound exhibits different degrees of symmetry. There are 3 distinct phases observed. Below 369K‚ the phase 3 structure belongs
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has the chemical formula C10H12O. This compound is said to be hydrogen deficient‚ meaning that it contains less hydrogen atoms than would be needed for each of the carbon atoms to have the maximum amount of hydrogen atoms attached. The IHD‚ or index of hydrogen deficiency for this molecule is 10. This indicates that there must be five rings or double bonds in the structure. Each of these would compensate for two of the missing hydrogen atoms. Since a saturated compound of the chemical formula C10H20O
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vice versa. Intermolecular forces are forces of attraction and repulsion between molecules that hold molecules‚ ions‚ and atoms together. The intermolecular forces that can be present in a solution are london dispersion forces‚ dipole-dipole force‚ hydrogen bonding and ion-dipole forces. In this experiment the substances that were used were acetone‚ methanol‚ water‚ 1- butanol and ethyl acetate. Acetone is the organic compound with the formula (CH₃)₂CO. It is a colorless‚ volatile‚ flammable liquid
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place two pieces of metal in water‚ and apply electricity‚ the water separates into it’s basic molecules‚ Hydrogen and Oxygen (H2O). If you look at the picture on the left‚ you will see H2O molecules connected together in their liquid form which is WATER But when you apply electricity (from your car battery)‚ the molecules separate and form a GAS (called HHO) which is a mixture of Hydrogen and Oxygen. This HHO GAS is then sucked into your engine and mixed along with the air from the air filter
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synthesized. Lighter‚ basic and abundant elements like hydrogen and helium were formed during the Big Bang. During Big Bang‚ space expansion cooled the early energy dominated universe and a lot of energy transformed into matter. These basic elements were then able to create the early stars and also the stars of today. Inside of these stars lighter elements fused to release large quantities of energy and in the process of doing that converted hydrogen and helium into heavier elementary particles. Such
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of Fuel By R.J. Kita Hydrogen is the lightest and most basic element known to man. With its simple structure comprised of only one proton and one electron‚ it is one of the major constituents of all hydrocarbon based fuels. By studying the response of hydrogen with respect to magnetic fields and the accompanying increased energy output‚ much can be learned and applied to other related fuels. In the oxidation/combustion of hydrocarbon fuels‚ it is the outer shell of the hydrogen that is combusted first
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