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what is the change in internal energy of a system that absorbs 0.570 kj of heat from its surrounding and has 0.843 kcal of work done on it give in scientific notation
Calculate [H+] and the pH of the following solutions
An aqueous solution contains the amino acid glycine. Assuming that the acid does not ionize in water, calculate the molality of the solution if it freezes at -1.1 degree centigrade.
Detrmine What mass of lithium (in g) is needed to react completely with 57.9 mL of Nitrogen gas at Standard atmospheric conditions?
Molarity of sodium carbonate, How many grams of primary standard grade sodium carbonate are necessary to prepare 2.00 L
One a cold day a person takes a breath of 450 ml of air at a pressure of 745 mm Hg and room temperature of 21oC. What is the volume of this air in the lungs at 37oC and 758 mm Hg?
Explain the relationship between the electron configuration and the corresponding principal and angular momentum quantum numbers for each of your elements.
How many moles of H3O+ must be added to one liter of a solution to adjust the pH from 7.90 to 6.16? Use E notation and 3 significant figures.
A solution containing 3.47mM X (analyte) and 1.72 mM S (standard) gave peak areas of 3473 and 10222, respectively, in a chromatographic analysis. Then 1.00ml of 8.47mM S was added to 5.00ml of unknown X, and the mixture was diluted to 10.0ml. This..
An ionic compound forms when aluminum (Z = 13) reacts with iodine (Z = 53). If a sample of the compound contains 1.23 x 1019 aluminum ions.
calculate delta H1 and delta H2 and heat capacities of the calorimeter plus salt solution.
The equilibrium constant Kp is measured (at an unspecified temperature) to be 0.66 for the reaction:
Suppose that you developed your own new temperature scale, denoted oN. You chose 30.0oN as the temperature of freezing water and 280oN as the temperature of boiling water at 1.0 atm pressure.
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