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Imagine that you are trying to design a new battery using the elements tin (Sn) and a halogen (Cl2, Br2, or I2) and you are using the reactions SnCl2 + KBr --> Kcl + Sn + Br2. Identify the cell reaction that will give the maximum operating voltage. Write out the oxidation and reduction half reactions, showing how they sum to the cell reaction. Identify the reaction that takes place at the anode and the cathode.
Four materials (A, B, C, D) have approximately equal melting points. All possible combinations of two of the four solids were prepared by combining equal amounts of each solid.
Carbonyl fluoride, COF2 , is an important intermediate used in the production of fluorine-containing compounds. For instance, it is used to make the refrigerant carbon tetrafluoride, CF4 via the reaction If only is present initially at a concentra..
Magnesium burns in oxygen gas to produce magnesium oxide. What mass of magnesium will react with a 0.25 L container of oxygen gas at 80oC and 770 mmHg?
A very crude model of the buckminsterfullerene molecule (C60) is to treat it as a collection of electrons in a cube with sides of length equal to the mean diameter of the molecule (0.7nm)
What is the pH of an 85 mL solution containing .215 M NaHCO3 and .203 M Na2CO3?
At 0.0 degrees C, if the volume of air is 1.5 mL and the pressure of the atmosphere that day is 685 mmHg, what is the number of moles of air?
determine the empirical and molecular formulas of a hydrocarbon which has a molecular weight of 84 mass unit which contains 85.7% carbon.
Ultraviolet light with a wavelength of 200nm is incident upon gold surface in a vacuum chamber. What is teh wavelength of the most energetic electrons that are ejected from the surface?
Acetone (CH3)2CO, has a larger dipole moment than water, but NaCl will not dissolve in it.
Lidocaine is thought to bind to receptors in its methylated form. identify in writting the atoms or groups in the compound that could be involved in its binding to a receptor via- hydrogen bonding (1 example)
Choose the element with more negative (more exothermic) electron affinity from each of the following pairs.
Calculate the concentrations of ALL species in a 0.740 M Na2SO3 solution. The ionization constants for sulfurous acid are Ka1
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