includes N atoms (N is Avogadro number) 10. III. C3H4 that includes 1‚5 N C atoms 11. Find relation between number of atoms of given matters. 12. I. 6 PH3 molecules 13. II. CO2 that includes 24N atom 14. III. 8mol O3 15. If‚ 8‚4 g X element includes 9‚03x1022 atoms and 0‚1mol X2Y3 compound is 16g find atomic mass of Y element. (Avogadro number is 6‚02x1023)
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Sound is a vibration that spreads across a medium (i.e.‚ air or water) as a mechanical longitudinal wave formed by pressure. A Mechanical longitudinal wave can also be called compression wave as it generates compressions and rarefaction when traveling through a medium. (Sound Is a Pressure Wave - Physics Classroom) The amplitude of a sound wave is the difference between the pressure of the undisturbed air and the maximum pressure caused by the wave. The Speed of sound deviates with the temperature
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Boyle declared in 1662 that‚ “For a fixed amount of gas kept at a fixed temperature‚ P and V are inversely proportional.” After Boyle many followed in the study of gases. Two scientists who chose to study this were Amedeo Avogadro and Joseph Louis Gay-Lussac. Amedeo Avogadro had hypothesized that Equal volumes of gases‚ at the same temperature and pressure‚ contain the same number
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1 SOME BASIC CONCEPTS OF CHEMISTRY 1 UNIT 1 SOME BASIC CONCEPTS OF CHEMISTRY After studying this unit‚ you will be able to • understand and appreciate the role of chemistry in different spheres of life; • explain the characteristics of three states of matter; • classify different substances into elements‚ compounds and mixtures; • define SI base units and list some commonly used prefixes; • use scientific notations and perform simple mathematical operations on numbers;
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energy is the energy of a body arising from motion of its atoms or molecules. It is directly proportional to the temperature of the substance. THE GAS LAWS Boyle’s Law At constant temperature‚ the pressure of a fixed amount of gas is inversely proportional to its volume. P1V1 = P2V2 Each curve corresponds to a different constant temperature and is known
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other contribution includes researches in the field of quantitative chemistry. “Amedeo Carlo Avogadro” Amedeo Carlo Avogardro was born in Italy in 1776 and his main contribution was in the field of relative molecular mass. He established the relationship between the masses of different gasses at the same volume and their corresponding molecular weights. His more noted contribution was the Avogadro law where he established the molar particle number to be exactly equal to 6.022 x 1023.
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LESSON 05.01 Wood blocks- solid Hammer- solid Lightning- plasma Fluorescent light bulb- plasma Steam and helium filled balloon is gas Water from a faucet and swimming pool is liquid - Can be distinguished at the molecular level by how the particles are held together - The phase of matter is considered a physical property because a change in a substance’s phase does not change the chemical properties or identity of the substance. - The phases of matter are determined by the kinetic energy
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the rate of reaction differs from the rate of increase of concentration of a product P by a constant factor (the reciprocal of its stoichiometric number) and for a reactant A by minus the reciprocal of the stoichiometric number. Reaction rate usually has the units of mol L−1 s−1. It is important to bear in mind that the previous definition is only valid for a single reaction‚ in a closed system of constant volume. This most usually implicit assumption must be stated explicitly‚ otherwise the definition
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“To acquire knowledge‚ one must study; but to acquire wisdom‚ one must observe.” ― Marilyn Vos Savant “You can’t just be reading books all the time and leave the writting of them to others.” ― Joseph Delaney‚ Night of the Soul Stealer “It does not matter where you go and what you study‚ what matters most is what you share with yourself and the world.” ― Santosh Kalwar “I don’t sing a song unless I feel it. The song don’t tug at my heart‚ I pass on it. I have to believe in what I’m
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Name: Angelica G. Morales Course: BSENVISCI- II Date performed: February 20‚ 2013 Date submitted: February 27‚ 2013 EXPERIMENT NO. 5 STOICHIOMETRY Stoichiometry From Wikipedia‚ the free encyclopedia Jump to: navigation‚ search Stoichiometry (pron.: /ˌstɔɪkiˈɒmɨtri/) is a branch of chemistry that deals with the relative quantities of reactants and products in chemical reactions. In a balanced chemical reaction‚ the relations among quantities of reactants and products typically form a ratio
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