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What is the PH of a 100 mM solution of PIPES if the pKa is 6.76?
What is the PH of a 250 M solution of TRIS if the pKa is 8.08?
A 100 mM solution of a weak organic acid has a PH of 3.6, What is the pKa of the acid?
SHow calculations
A catalyst decreases the activation energy of a particular exothermic reaction by 59 kJ/mol, to 51 kJ/mol. Assuming that the mechanism has only one step, and that the products are 94 kJ lower in energy than the reactants
A helium gas cylinder at 25 Celcius is used to fill balloons and has a total volume of 43.8 L and a pressure of 1.51 x 10^4 kPa. how many moles of helium are in the tank
composition diagram to explain why fractional distillation of 2 components is more easily accomplished if the components have boiling points that differ by 20 C or more?
If 1.20 grams of sodium metal are reacted with 4.00 mL of water, how many grams of NaOH will be produced. (The density of water = 1.00g/mL)
Utilize TLC to monitor a reaction that converts an alcohol into a carboxylic acid. Give diagrams to show a) the reaction is incomplete and b) the reaction has gone to completion
what masses of NaCl and water are needed to prepare 1000g of a solution that is 0.90% by mass
What are the steps involved in making a lewis structure of a molecule where there is either too few or too many electrons present?
if the reaction produces 5.72 grams of a compound called magnesium ammonium phosphate,MgNH4PO4. what is the percentage of phosphorus in the original plant food sample?
Consider the following cell: Pt|H2(g, 0.645 atm)|H (aq, ? M)||Ag (aq, 1.00 M)|Ag(s) If the measured cell potential is 1.20 V at 25 °C and the standard reduction potential of the Ag /Ag half-reaction couple is 0.80 V, calculate the hydrogen ion con..
An aqueous solution that is 94.00 % by mass sulfuric acid(conc) has a density of 1.83 g/mL. Calculate the molarity (M) of the solution.
A sample of a compound is found to contain 1.011 g of chromium and 0.467 g of oxygen. What is the empirical formula for this compound
Calcium hydroxide dissolves in water to the extent of 1.04 g/L. What is the value of Ksp for Ca(OH)2
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