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How many grams of water can be cooled from 45^circ {rm C} to 20^circ {rm C} by the evaporation of 65 {rm g} of water? (The heat of vaporization of water in this temperature range is 2.4 {rm kJ}/{rm g}. The specific heat of water is 4.18 {rm J}/{rm g}cdot {rm K}.)
At least how many standard solutions would you need to make calibration graph, assuming that the graph is expected to be a straight line? Explain your answer. Do not include the data from distilled water
A solution made by adding 105g of NaCl to 1 kg of water freezes at 20 degrees F (-6.7 degrees Celsius). Calculate the mass of CaCl2 that would lead to the same freezing point depression
Draw the following compound. Be sure to specify the stereochemistry via wedge-and-dash bonds.
Propanoic Acid, HC3H5O2, is a weak acid. A 0.125 M solution of propanoic acid, HC3H5O2, dissociates 1.020%. Using this information, calculate the pH of the 0.125 M solution of propanoic acid.
The relationship (if any) of the lattice energy of compounds such as ZnO vs. H3BO3 vs. their respective solubilities. For instance, at neutral pH and standard conditions
Calculate the potential of a galvanic cell with two platinum electrodes, the one immersed in a solution that is .0301 M in \(Fe^{3+}\) and .0760 M
Compare the stability of a tertiary carbocation, a secondary carbocation, and a primary carbocation, each with the formula C9H19+. Be sure to delete a hydrogen at the positive center and set the total charge to cation when you setup the calculatio..
One of the vibrational modes (the asymmetry stretch) of the CO2 molecule is at 2349 cm-1. Convert this to eV, nm and K.
For a reversible reaction with a one-step mechanism, A B , the rate of the forward reaction is ratef = 3.2 x 10-6 s-1 [A] and the rate of the reverse reaction is rater = 4.6 x 10-4 s-1 [B]. What is the value of Kc for this reaction
Write a net ionic equation, including states for teh reaction of Cobalt (II) Chloride and Silver Nitrate 2. Circle the species in which nitrogen has the highest oxidation number
The atmospheric pressure in the room when the measurement was made was 628 mmHg and the temperature was 36.0 degrees C. What is the density of the gas?
The solubility of silver sulfate in water is 0.223% (w/v) at 35°C. Calculate the solubility product of this salt at this temperature
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