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calculate the sodium ion concentration in a solution formed by diluting 35.00 mL of a .585 M sodium phosphate solution to a final volume of 145.00 mL
Compute the ratio of the concentration of H 2 CO 3 to that of the HCO 3- if The pH of a bicarbonate-carbonic acid buffer is 8.50
Compound Y has a solubility of 2.0 g/100 mL in water and 20.0 g/100 mL in ether. What weight of compound Y would be removed from a solution of 1.8 g of Y in 100 mL of water by a single extraction with 100 mL of ether?
The reaction of 2.5g of Al with 2.5g oxygen (actually) produces 3.5g of Al oxide. Calculate the % yield of aluminium oxide.
How much potassium nitrate has to dissolve in water to absorb 118 kj of heat? Lattice E is -163.8kcal/mol and heat of hydration is -155.5 kcal/mol.
How much heat is required to warm 221 g of ice from -44.7°C to 0.0°C, melt the ice, warm the water from 0.0°C to 100.0°C, boil the water, and heat the steam to 173.0°C?
What volume in milliliters of a 0.0992 M NaOH solution is required to reach the endpoint in the complete titration of a 15.0 mL sample of 0.107 M H3PO4?
The number of different constitutional isomers that can be drawn for C2H4Br2 is equal to
Calculate the mass in grams for a sample of Al that absorbs 1.70kJ when the temperature increases from 56 degree Celsius to 177 degree Celsius?
To what volume must 558 mL of 13 M Ca(OH)2 solution be diluted to make a 3 M Ca(OH)2 solution?
A voltaic cell is set up at 25º C with thefollowing half cells: Al3+ (0.0010 M) | Al and Ni2+(0.50 M) | Ni. Write an equation for the reaction that occurs when the cellgenerates an electric current and determinethe cell potential.
The average molecular weight of the protein by gel permeation is 525000 g mass/g mol. Calculate the mole fraction of each component in solution.
What is the solubility in moles/liter for copper(II) iodate at 25 oC given a Ksp value of 1.4 x 10-7. Write using scientific notation and use 1 or 2 decimal places (even though this is strictly incorrect!).
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