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Question- Express the concentration of a 0.0890 M aqueous solution of fluoride, F-, in mass percentage and in parts per million. Assume the density of the solution is 1.00 g/mL
Please answer only if you are 100% confident
A 10.0-mL sample of a HCl solution has a pH of 2.000. What volume of water must be added to change the pH to 4.000?
Phosphorus-32 has a half-life of 14.0 days. Starting with 8.00 g of 32 P, how many grams will remain after 112 days?
Define a flask contains 250ml of a 0.125 solution of Na3PO4. If A sample containing 0.250 moles of Na+ is added to the solution. Presuming no volume change, define what is the new molarity of the new solution
If it took 8.54 mL of .150 M lead (ii) nitrate what is the mass of chloride in the ointment? What is the mass of Chloromycetin? What is the percent chloromycetin in the solution?
Nitrobenzene can be nitrated with a mixture of nitric and sulfuric acids. Draw the product that contains two nitro groups. Include all formal charges.
Determine How hot should be the air in a ballon be heated if it has initially a volume of 750. L at the temperature of 20 degree celsius and the final volume must be 1,000.l
A solution is prepared by dissolving 0.16 mol of acetic acid and 0.16 mol of ammonium chloride in enough water to make 1.0 { L} of solution. Find the concentration of ammonia in the solution.
Compute the potential of the silver electrode indicator. Compute the cell potential. KNO3 is simply present as supporting electrolyte.
Calculate the pH for each of the following cases in the titration of 50.0 mL of 0.210 M HClO(aq) with 0.210 M KOH(aq). (a) before addition of any KOH (b) after addition of 25.0 mL of KOH (c) after addition of 40.0 mL of KOH
Consider the following data. 2 Ca(s) + O2(g) 2 CaO(s) H = -1270.2 kJ C(s) + O2(g) CO2(g) H = -393.5 kJ CaO(s) + CO2(g) CaCO3(s) H = -178.3 kJ Use Hess's law to calculate H for the reaction below.
At a certain temperature, the pH of a neutral solution is 7.45. What is the value of Kw at that temperature
Calculate the pH of a solution that is .150 M in sodium formate and .200 M in formic acid (Ka=1.8*10^-4)
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