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A sample of hard water contains 20mg of Ca++ ions per liter. Explain how many milliequivalents of Na2Co3 would be required to soften 1 liter of sample?
Find the mass of a reactant using Dalton's law of partial pressures, ideal gas law, and stoichiometry - Determine the amount of zinc metal in grams consumed in the reaction.(Vapor pressure of water at 25 o C-23.8mmHg)
If 4 mol of a gas at 100 K and 1 atm occupies a volume of 2.5 L, what would the pressure be, in atm, if the volume decreased to 2.0 L and the temperature increased to 110 K
Make a table showing the gram quantities, and mole quantities of each reagent required in the Diels Alder reaction. Outline the steps required for this synthesis
Two of these students will report, within experimental error, the same increase in solution temperature for the neutralization. Which are the two students? Explain.
the equilibrium constant kc for the following reaction is 7.00e-5 at 673 k. calculate kp for this reaction at this
what is the maximum number of electrons that can be accommodated in a all the 5g orbitals 8. b all the 6f orbitals and
When 22.63 mL of aqueous NaOH was added to 1.214 g of CHES (pKa =9.39; and MM = 207.29 g/mol) dissolved in 41.37 mL of water, the pH was 9.24. Calculate the molarity of NaOH.
In a 0.10 M solution of a weak diprotic acid H2A the species present in highest concentration (besides water) would be
a compound having an approximate molar mass of 120-15 g has the following percent composition bymass carbon 38.44
A 141-mL sample of gas is collected over water at 22°C and 753 torr. What is the volume of the dry gas at STP?
the concentration fo certain sodium hydroxide solution was determined phthalateabbreviated as khp. khp is an acid with
What are the pH values if you take into account that the 8.00 mL of 0.10 M Acid was first diluted with 100 mL of water
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