CHEM 1474-E01 Chemistry for Everyday WEEK5 Lab Report Spring 2017 Instructor: Kyoung Nan Kim Office: SI3076 Email: kyoung.kim@ucdenver.edu Office hour: M/W 1:00p-2:30p (SI3076) T/Th 12:30p-1:30p (SI3076) • All communication should be done via school email (xxxx@ucdenver.edu) • The work will be submitted through canvas assignments. You can simply upload doc/pdf files under “Lab report” assignment tap. • Review: Ch2‚ Ch3.5‚ Ch 4.2‚ Ch6.1 and Ch7.1-Ch 7.3 in your text book (21st
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Van der Waal’s forces -- Electrons will not be evenly spread around an atom/molecule at any given time‚ meaning the molecule will have a slight +ve charge on one end‚ and a -ve at the other. this temporary state may cause attraction between two molecules‚ pulling them together (also known as London dispersion forces). The magnitude pof Van der Waals force depends on the relative molecular mass‚ high mass produces a larger force. Boiling points of the alkanes data and alkenes data These very
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semiconductor materials control laser emission spectra to enable long-distance transmission of data over optical fibres; they also ensure narrow spot-size laser read/write beams in CD and DVD players. In quantum optical devices‚ microcavities can coax atoms or quantum dots to emit spontaneous photons in a desired direction or can provide an environment where dissipative mechanisms such as spontaneous emission are overcome so that quantum entanglement of radiation and matter is possible. Applications
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| Levels of organization in the living world: 1. Biosphere 2. Ecosystem 6. Organs-Organ Systems 3. Communities 7. Tissues 4. Population 8. Cells 5. Organism 9. Organelles 10. Molecules and Atoms Homeostasis- The steady state of body functioning; the tendency to maintain relatively constant conditions in the internal environment even when the external environment changes. Homeostasis is dependent on negative feedback to give it signals to
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take a while). a) The atoms are not in motion. a.A) not moving. a.B) vibrating about a fixed position. a.C) sliding past each other. a.D) moving independently around the container. b) Is this physically possible (think Third Law of Thermodynamics)? No c) Go up to the tab that says “teacher” and change the temperature scale from Kelvin to Celsius. According to this 0 K = -273 ºC. Change the scale back to Kelvin. d) Notice the pattern of the atoms relative to each other
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perform a quantitative analysis of these substances" (Internet 1). 2.2 The electrons of an atom exist in different energy levels. When energy is added to an atom in the form of light/heat/electrical energy‚ the atom becomes excited and electrons begin to ’jump ’ to higher energies (Figure 1). There are two states that an atom can exist - an excited state and a ground (natural) state. The ground state of an atom is when the electrons are in their lowest energy level. The use of a flame photometer "relies
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carbon‚ hydrogen‚ nitrogen and oxygen. Carbon is found in each of the large biomolecules. 2. Outline the difference between an atom and an ion. An atom has the same amount of protons as electrons‚ so it is neutral in charge. It is a single particle of a chemical event. When an atom gains or loses an electron it becomes an ion. Ions are charged‚ while atoms are uncharged. An ion has either a positive or negative charge because there are unequal numbers of electrons and protons. A positive
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understand that all atoms want full shells. All atoms‚ except for noble gases‚ have valence electrons. These electrons are the ones on the outermost shell. All atoms either want to get rid of these electrons or gain enough to make a full shell. Metals‚ which are on the right side of the periodic table‚ have less than 4 valence electrons. This means they want to get rid of those electrons. Nonmetals‚ which are on the left side of the periodic table‚ have more than 4 valence electrons. These atoms want to gain
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Calculate the mass of stearic acid required to form the monolayer‚ use it to estimate the thickness of the monolayer (which is related to the length of the stearic acid molecule)‚ and then use the number of carbon atoms in stearic acid to approximate the diameter and then the volume of a carbon atom calculate a value for the Avogadro constant compare your calculated value for the Avogadro constant with a known value and determine the percent error in your value This is a general overview
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is defined by Campbell and Reece as occurring when a hydrogen atom is covalently bonded to an electronegative atom but attracted to another electronegative atom. In water molecules‚ there are several key reasons why hydrogen bonds can be formed and explaining them in water a good way to show the chemistry. Firstly‚ the presence of covalent bond between the hydrogen and the oxygen means that the electrons in the outer shells of both atoms are shared- 1 electron from hydrogen and 1 electron from oxygen
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