Calculate the time required for the reactant concentration
Calculate the time required for the reactant concentration to drop to (a) 25 percent of the initial value, (b) 10 percent of the initial life. The half-life of a first-order decomposition reaction is known to be 10 minutes.
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Determine an unknown with the molecular formula C4H6. Determine the numbers of degrees of un-saturation are present?
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A 29.19 mL sample of the HCl solution required 21.18 mL of NaOH solution for complete reaction. What is the molarity of the HCl solution? A 0.05500 M solution of NaOH was used to titrate a solution of unknown concentration of HCl.
Potassium bromide (10.5g), also at 24.2 degree C, is added to the water, and after the KBr dissolves the final temperature is21.1 degree C. A coffee-cup calorimeter initially contains 125g water at 24.2degree C.
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Suppose the percent abundance of the lighter isotope were 62%. Chlorine has two stable isotopes of mass 34.97 u and 36.97 u. Explain what would be the atomic mass of Cl when the actual abundance is 75.77%.
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