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A river contains 10.5 mg/L of dissolved silica. The measured pH = 6.5 and the water temperature is 25 degrees Celcius. Calculate the concentration of each silica species in solution.
Explain possible reason for discrepency between the actual pH of the buffer and the reported pKa of the weak acid. (My case: actual pH =9.23, reported pKa =9.25)
Estimate the vapor pressure at temperatures of 273, 298, 363, 383, and 423 K respectively
If the initial concentration of A=2.5 mol/L, the initial [B]=1.4 mol/L, and the rate =0.29 moles of product per liter per minute (M/min). Calculate the rate constant K to 2 decimal places.
Dehydration of 2-methyl-2-pentanol forms one major and one minor organic product. Draw the structures, including hydrogen atoms
One method of estimating the temperature of the center of the sun is based on the assumption that the center consists of gases that have an average molar mass of 2.00 g/mol.
Acetylene gas, , burns in oxygen to produce carbon dioxide and water. If 60.4 g of CO2 are produced when 22.62 c2h2 react with sufficient oxygen, what is the percent yield for the reaction
A molecule has the empirical formula C3H7 and has a density of 3.844g/L at STP. If one mole of this gas is burned completely in excess oxygen, how many moles of CO2 are produced
what is the mass of one mole of copper atoms? How many moles of copper atoms have a mass equal to the mass of a penny?
What is the pH of the solution created by combining 2.00 mL of the 0.10 M base with 8.00 mL of the 0.10 M acid?
The generic metal hydroxide M(OH)2 has Ksp = 1.05×10?18. (NOTE: In this particular problem, because of the magnitude of the Ksp and the stoichiometry of the compound, the contribution of OH- from water can be ignored
Calculate the molar kinetic energy (in joules per mole) of a sample of Ne(g) at (a) 25.00 degree C and (b) 26.00 degree C
Which electrode gains mass and which loses mass as the cell reaction proceeds. What is the equation for the equation for the overall cell reaction. What is the emf generated by the cell under standard conditions
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