protons and neutrons. Aproton is the nucleus of the simplest atom - hydrogen. A proton and a neutron formeddeuterium‚ which then formed helium. (77%hydrogen‚ 23% helium) 7.Describe what must have happened after the Big Bang. The expanding universe was foggy and opaque‚ containing energy in the form of radiation.300 000 years after the big bang‚ the universe dropped to 3000°C. This allowed the electronsto be captured by hydrogen and helium nuclei to form new atoms and elements‚ and the fogstarted
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An example would be the reaction between silicon and hydrogen‚ where each silicon has an electron octet and each hydrogen has an electron duet. With that ratio being four hydrogen atoms bonding to each silicon atom‚ the empirical formula can be computed to be SiH4. In this experiment‚ I will write chemical equations using Lewis symbols and Lewis structures to represent
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generally means adding more carbon-hydrogen bonds to a compound. In a reduction reaction the oxidation number of a carbon atom decreases. The opposite is an oxidation reaction in which the carbon atom oxidation number increases. In compounds with double or triple bonds a reduction reaction can occur by adding hydrogen atoms across the pi-bond. This can change an unsaturated compound to a saturated compound. Saturated means that the compound has the maximum amount of hydrogen bonds with no double or triple
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concentration of H+(aq) ions by titrimetric analysis. 9 F The hydrogen gas formed in the reaction between zinc and dilute hydrochloric acid CANNOT escape from a closed reaction vessel. Thus‚ the mass of the reaction mixture would NOT decrease as the reaction proceeds. 10 F It is difficult to measure the volume of water produced from the reaction between oxalate ions and permanganate ions in aqueous solution. 1 11 T During the decomposition of hydrogen peroxide solution‚ oxygen gas is formed. 2H2O2(aq)
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nitrogen from the air with hydrogen from natural gasses like methane into ammonia. This process is a reaction that ’s reversible and the production of ammonia is exothermic.
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Clays are one of the important natural materials‚ which have been examined for catalytic applications. Clays are characterized by a layered structure and hence they are slippery when wet. They are broadly classified as cationic or smectite type (having layer lattice structure in which two-dimensional oxyanions are separated by layers of hydrated cations) and anionic or brucite type (in which the charge on the layer and the gallery ion is reversed complimentary to smectite type). Anionic clays are
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charge and some have a positive charge. Citric Acid Citric acid is a weak organic acid with the molecular formula C6H8O7‚ which means a molecule of the acid contains six carbon atoms‚ eight hydrogen atoms‚ and seven oxygen atoms. When it is dissolved in water‚ it partially ionizes to yield three H+ ions (hydrogen atoms which are missing their electron) and a C6H5O7(3-) ion (the 3- means that it has three extra electrons.) The resulting solution is called an "electrolyte." Citric acid is an acid; albeit
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g/cm 3 0.6603 g/cm 3 0.716 g/L 0.7914 g/cm 3 1.27 g/cm 3 −119 79 Decompose 69 86 −95 −182 −94 86 −164 65 Decompose Inorganic Substances Name *Density @ STP Melting Point (°C) Boiling Point (°C) Chlorine Hydrogen Hydrogen chloride Hydrogen sulfide Nitrogen Nitrogen monoxide 3.21 g/L 0.0899 g/L 1.640 g/L 1.54 g/L 1.25 g/L 1.34 g/L 1.43 g/L 2.532 g/cm 3 2.165 g/cm 3 2.92 g/L 1.00 g/cm 3 −101 −35 −259 −115 −85 −253 −85 −61 −210 −164 −218 851 801 −73
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13‚ 8‚ 10 Save Question 2 (2.7 points) When aluminum metal is dissolved in perchloric acid‚ aluminum(III) perchlorate and hydrogen gas are formed. In the balanced equation for this reaction‚ what is the coefficient of hydrogen gas? Question 2 options: 3 2 1 4 5 Save Question 3 (2.7 points) The coefficients of calcium hydroxide and hydrogen‚ respectively‚ in the balanced equation for the reaction of calcium with water are Question 3 options: 1 and 3. 1 and 2
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liquids are called an inorganic makeup of our body. Liquid takes form of its container. * Gases: no definite shape‚ carbon dioxide‚ oxygen‚ hydrogen gas‚ and nitrogen gas. Elements: unique substances in our body that cannot be broken down into simpler substances by ordinary means. Four elements that compose our body. * Carbon: * Hydrogen: * Oxygen: * Nitrogen: Make up 96% of our bodies weight. Atoms Defined as the smallest non destructible parts of any element that
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