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chapter 4 review: types of chemical reactions and
chapter 4 review: types of chemical reactions and

... 8. 2 H2O + 4 MnO4- + 3 ClO2-  4 MnO2 + 3 ClO4- + 4OHWhich species acts as an oxidizing agent in the reaction represented above? (a) H2O (b) ClO4(c) ClO2(d) MnO2 (e) MnO49. The volume of distilled water that should be added to 10.0 mL of 6.00 M HCl (aq) in order to prepare a 0.500 M HCl (aq)solution ...
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... + wave travels to left (in the direction of decreasing x) - wave travels to right (in the direction of increasing x) The phase angle  shifts the cosine or sine function left or right. This can be used to match some initial condition for the wave function. Speed of the harmonic wave (phase velocity) ...
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... Table I with the results of Eq. (3) graphed in Fig. 2. Recently, use of a thin contrast-enhancement layer on top of the photoresist has been shown to improve resolution.6 This type of resist system can be modeled with the use of Eq. (4). The condition that the photoresist be homogeneous is true only ...
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... Fig. 1. The crystal structure of alexandrite looking along the c axis (25). The arrows indicate the locations of ion sites that have mirror or inversion symmetry. On the right, the corresponding energy-level diagrams for Cr3⫹ ions at the different sites are shown. Mirror-site ions experience excited ...
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... The decomposition of N2O5(g) is a first-order reaction with k = 7.0 × 10−2·s−1. If the initial concentration of N2O5(g) is 1.5 M, what is the concentration of N2O5 after 92 seconds? A. ...
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Ultraviolet–visible spectroscopy



Ultraviolet–visible spectroscopy or ultraviolet-visible spectrophotometry (UV-Vis or UV/Vis) refers to absorption spectroscopy or reflectance spectroscopy in the ultraviolet-visible spectral region. This means it uses light in the visible and adjacent (near-UV and near-infrared [NIR]) ranges. The absorption or reflectance in the visible range directly affects the perceived color of the chemicals involved. In this region of the electromagnetic spectrum, molecules undergo electronic transitions. This technique is complementary to fluorescence spectroscopy, in that fluorescence deals with transitions from the excited state to the ground state, while absorption measures transitions from the ground state to the excited state.
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