the law of conservation of mass? ANSWER: In a chemical reaction‚ matter is neither created nor destroyed. In a chemical reaction‚ matter is created and destroyed. In a chemical reaction number of atoms remains constant. In a chemical reaction energy remains constant but cannot be recreated‚ although it may change forms. Part B - Who discovered it? ANSWER: Antoine Lavoisier Amedeo
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AMEDEO AVOGADRO : Lorenzo Romano Amedeo Carlo Avogadro di Quaregna e di Cerreto‚ Count of Quaregna and Cerreto (9 August 1776‚ Turin‚ Piedmont – 9 July 1856) was an Italian savant. He is most noted for his contributions to molecular theory‚ including what is known as Avogadro’s law. In tribute to him‚ the number of elementary entities (atoms‚ molecules‚ ions or other particles) in 1 mole of a substance‚ 6.02214179(30)×1023‚ is known as the Avogadro constant. Avogadro’s Life Amedeo Avagadro
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balance the centripetal force with gravitational force. Define the radian angle at centre of circle‚ arc equal in length to radius State and explain whether the motion of the ball is simple harmonic. (such as a ball bounce) acceleration is constant (g)‚ so cannot be s.h.m. Glossary: Oscillations: a repetitive back-and forth motion Free oscillations: no energy loss or gain Simple harmonic motion: acceleration directed towards a fixed point‚ and acceleration proportional to distance from
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Becca DeHaven ChemC-125 Avogadro’s Law Experiment Report Introduction: The following experiment’s purpose was to confirm Avogadro’s Law and experimentally determine the Universal Gas Constant “R”. Amedeo Avogadro hypothesized that all gases of equal volume‚ temperature and pressure would contain equal amounts of moles. This idea that volume is directly proportional to moles sprung from other similar hypotheses. Robert Boyle found that pressure and volume are inversely proportional‚ meaning as pressure
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CHAPTER # 1 Q.DEFINE CHEMISTRY. A. Chemistry‚ a branch of physical science‚ is the study of the composition‚ properties and behavior of matter. Chemistry is concerned with atoms and their interactions with other atoms‚ and particularly with the properties of chemical bonds. Chemistry is also concerned with the interactions between atoms and various forms of energy Q.DEFINE THE BRANCHES OF CHEMISTRY. * Physical chemistry is the study of macroscopic‚ atomic‚ subatomic‚ and particulate phenomena
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L. Lavoisier laid the foundation of chemical sciences by establishing two important laws of chemical combination. (a) The Law of conservation of mass states that mass can neither be created nor destroyed in a chemical reaction. (b) The law of constant proportions which is also known as the law of definite proportions was stated by Proust as “In a chemical substance the elements are always present in definite proportions by mass”. E.g. In a compound such as water‚ the ratio of the mass of hydrogen
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Laws Boyles law: P at constatnt T is iversely prop to V P1V1=P2V2 EX:Calculate the volume of a sample of gas at 5.75 atm if it occupies 5.14 L at 2.49 atm. (Assume constant temperature.) Charles Law: V at constant P is directly prop to absolute T V1/T1 = V2/T2 Avogadro law: V is directly prop to number of moles (n) at constant T and P V1/n1 = V2/n2 EX: What volume in liters of water vapor will be produced when 34 L of H2 and 17 L of O2 react according to the equation: 2H2(g) + O2(g) → 2H2O(g)
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electric current. Amedeo Avogadro (1776 - 1856) - He is known for proposing the Avogadro’s Law which states that‚ "Equal volumes of gases contain the equal number of molecules when the given temperature and pressure are same for all the gases." The number of molecules present is known as‚ Avogadro’s number and is 6.023 x 1023 Jons Jacob Berzelius (1779 - 1848) - He was Swedish and gave the technique of chemical formula notations. He also proposed the law of constant proportions‚ which proved
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The International System of Units And its base units PDF generated using the open source mwlib toolkit. See http://code.pediapress.com/ for more information. PDF generated at: Wed‚ 08 May 2013 17:06:00 UTC Contents Articles Overview International System of Units 1 1 20 20 30 35 37 39 39 42 51 69 75 78 82 86 90 90 93 Organisations Metre Convention General Conference on Weights and Measures International Bureau of Weights and Measures International Committee for Weights and Measures
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|WEEK |LEARNING OBJECTIVES |LEARNING OUTCOMES |ACTIVITIES |REMARKS | |1 |FORM 4 ORIENTATION | | |4/1 – 6/1 |
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