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You have 0.0250 L of hydrochloric acid with an unknown concentration. You are using a 0.700M aqueous ammonia solution for your titration, and reach the equivalence point after using 10.0mL. Please i) write down the complete and balanced neutralization reaction, and ii) calculate the concentration of the hydrochloric acid.
If a solution is made by adding 83 grams of sodium hyroxide to 750 ml of water what is the percent by mass of sodium hydroxide in this solutions ?
calculate the temperature change in the water upon complete melting of the ice. hint determine how much heat is
Draw a structural formula of the R configuration of the compound shown below. Illustrate the stereochemistry about the chiral carbon using the "single up" (solid wedge) and "single down" (hashed-line wedge) bond tools. Show explicitly the bonds to..
201.0 nm ultraviolet light strikes a metal plate and ejects electrons having kinetic energy E = 3.54 eV. Calculate the binding energy of an electron at the metal surface
Using your knowledge of particles, explain why the process of evaporation has a cooling effect on the skin. How would you describe the difference between a chemical change and a physical change? In your answer provide an example of each
In standardizing a solution of HCl, it is found that 47.26 mL of the acid are equivalent to 1.216 g of pure Na2CO3, what is the normality of the acid
Predict the wavelength (in nm) of the lowest energy electronic transition in the dye polymethine ion. Assume all C-C and C-N bond lengths are the same and are 1.4 A (0.14 nm) and that N+1 contributes 1 π-electron and N contributes 2 π-electrons
A 952 cm3 container of gas is exerting a pressure of 108 kPa while at a temperature of 48 °C. Calculate the pressure of this same amount of gas in a 1236 cm3 container at a temperature of 64 °C.
Design a series of reactions to convert ethanol to 2-butanol. You can use other inorganic reagents you need
Uric acid dissociates as shown in the figure at the right with a pKa of 5.80, and can be treated as a simple monoprotic acid in this pH range. Its solubility in urine depends on the relative amount of protonated and unprotonated forms. A urine sam..
A 50.0 L steel tank at 20.0 degree C contrains acetylene (C2H2) at a pressure of 125 atm. assuming ideal behavior, how many grams of acetylene are in the tank
CCl4 dipole-dipole dispersion ion-dipole ion-ion (b) CsBr dipole-dipole dispersion ion-dipole ion-ion (c) BaCl2 dipole-dipole dispersion ion-dipole ion-ion
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