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A 6.38 mg sample of potassium hydrogen phthalate was dissolved in 50 mL of water and to use as a standardizing aging. If 36.5 mL of NaOH was required to reach the end point, what is the concentration of the solution in uM?
A chemist measures the amount of bromine liquid produced during an experiment. She finds that 766.g of bromine liquid is produced. Calculate the number of moles of bromine liquid produced.
A 4.60 g nugget of pure gold absorbed 288 J of heat. What was the final temperature of the gold if the initial temperature was 26.0°C? The specific heat of gold is 0.129 J/(g·°C).
The rate constant of a reaction is 4.7 10-3 s-1 at 24°C and the activation energy is 33.6 kJ/mol. What is the value of k at 75°C?
The pKa values of a compound with two ionizable groups are pKa1 = 4.10 and pKa2 between 7 and 10. A biochemist has 10 mL of a 1.0 M solution of this compoud at a pH of 8.00. She adds 10.0 mL of 1.00 M HCl,
What was the volume of the aluminum cylinder in cm3? The mass of the aluminum cylinder was determined to be 30.1 grams. What is the density of the aluminum?
the water level in the collecting vessel is the same as the outside level. Atmospheric pressure is 756.0 Torr and the temperature is 25 degrees C. Calculate the atomic mass of the metal.
Assuming an atmospheric pressure of 1 atmosphere, how cold does it have to be to keep your lighter from working?
calculate the pH and concentration of all species present assuming that the activity coefficients are equal to 1.0 for all species
In a flame test in the lab, the compound Barium Chloride and Barium nitrate have ions, what are the cations and anions for both.
Identify the two important classes of catalysts. Analyze the chemical reactions that take place when a biological catalyst combines with a reactant (substrate) to form an unstable intermediate.
Write a balanced equation for the reactant, then identify the type of reaction it demonstrates remember your diatomic atoms complete reaction
snickers bar holds 1.17 megajoules of energy. How many large calories or Calories are present in a snickers bar?
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