Myth and legends have been of much fascination theme among Iranian authors. This seems to arise from the fact that the stories appeal to children who always want explanations about the puzzling reality around them. Children normally marvel at things their minds find complex and their inquisitive minds long to discover and explain the intriguing reality. For instance‚ children are fascinated by the appearances and actions of especially animals; why are they of different colors‚ shapes and sizes? Why
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Empirical Formula of Copper (II) Chloride Gabriella Jane Lukas B1401404 HELP University Empirical Formula of Copper (II) Chloride Objectives 1. To validate that the empirical formula of copper (II) chloride is . 2. To calculate the percent composition of copper in copper (II) chloride. 3. To illustrate the Law of Constant Composition in copper (II) chloride. 4. To study the reaction between copper (II) chloride solution and aluminium metal. Introduction One of the most fundamental statements
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Atomic structure: scientists 1. Democritus: 1st person to think of atom (500 BCE)- philosopher Atom is the smallest piece of an element that has same properties as the element. 2. Lavisier: Law of conservation of mass/ matter • Mass can’t be created or destroy; same amount of stuff 3. Joseph Proust: Law of constant composition (law of definite Proportions) • A compound is always made of the same elements in the same ratio. 4. John Dalton: English school teacher who derived the atomic theory
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Chemistry 200 Exam 1 Review Problems 1. Calculate the number of atoms in 10.0 grams of Fe. 2. Give the mass number‚ #protons‚ #neutrons and #electrons for the isotope strontium-88. 3. Calculate the number of moles of carbon in 50.0 g of benzene C6H6 4. A substance is found to be 38.7 % C‚ 9.7 % H and 51.6 % O by mass. Its molar mass is 62.1 g/mole. What is its molecular formula? 5. Name the following: a) Ca(OH)2 b) KCN c) HClO4(aq) d) FeSO4 e) Na2O f) SF6 g)
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to commit this offense‚ especially if working on a paper at last minute trying to make a deadline. There’s no excuse for anyone to do be dishonest and used someone else hard work. I wrote my most resent essay for my Hazardous Material class here in AMU. I was given several questions and I had to research and answer them in an essay format. The guidelines that I found easier to follow was critical thinking and critical reading. I found them straightforward because throughout the course of researching
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My Element: Gold Origin of name: From the Old English word geolo (yellow) Symbol: Au Atomic Number: 79 Atomic Mass: 196.96655 amu Group/section: Gold is element number 79 found in group 11 period 6 Electron configuration: [Xe] 4f14 5d10 6s1 Valence electrons: 1 Physical or chemical properties: Color: gold Crystal Structure: Cubic Density at 293 K: 19.32 g/cm3 Melting Point: 1064.43 °C (1337.5801 K‚ 1947.9741 °F) Boiling Point: 2807.0 °C (3080.15 K‚ 5084.6 °F) Number of Neutrons: 118
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Copper is involved in the formation of red blood cells. These enzymes in turn produce cellular energy and regulate nerve transmission‚ blood clotting‚ and oxygen transport. Name: Copper Symbol: Cu Atomic Number: 29 Atomic Mass: 63.546 amu Melting Point: 1083.0 °C (1356.15 K‚ 1981.4 °F) Boiling Point: 2567.0 °C (2840.15 K‚ 4652.6 °F) Number of Protons/Electrons: 29 Number of Neutrons: 35 Classification: Transition Metal Crystal Structure: Cubic Density @ 293 K: 8.96 g/cm3
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Even though the irrigation of the desert did wonders to the farming industry‚ it has left the Aral Sea a complete disaster. The Aral Sea is located in the northern part of Uzbekistan and the southern part of Kazakhstan‚ and primarily fed by the Amu-Darya River from the South and the Syr-Darya River from the North. Uzbekistan and Kazakhstan were part of the former Soviet Union during the 1960s‚ the time when they began to divert the rivers flow of water. This caused the surface level of the lake
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MOLE UNIT REVIEW WORKSHEET 1. Convert 500.0 g NaCl to formula units. 5.15 x 1024 f.u. Convert 9.8 x 1024 molecules of C2H6 to grams. 4.9 x 102 g The mass of an unknown gas is 11.59 g. The mass of an equal volume of He is 1.45 g. Calculate the molar mass of the unknown gas. 32.0 g/mol Calculate the percentage composition of sulphur in Al2(SO4)3. 28.11% Calculate the molar mass of Co2(SO4)3•6H2O 514.16 g/mol The empirical formula for a compound is C2H5O and its molecular mass
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PASASALAMAT: ate kaye First of all‚ I would like to thank God for this memorable occasion . thank you for the chance to have this party. For the sponsors of this occasion. THANK YOU. For my ninangs‚ ninongs. Antes and uncles. Thankyou sa Financial support. For this without you. This party could not be great.. Lola mameng. Lola moning. THANYOU! For the financial support and most of all thank you for the encouragement and moral support that you’ve showed to me. For my 18 candles and my 18 roses
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