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A) What is the molarity of C6H12O6 in an aqueous solution that is prepared by dissolving a 20.95 g sample of impure C6H12O6 in water to make 1,450 mL of solution. Assume that the sample is 93% C6H12O6 by mass. Enter your answer in mol/L, accurate to three significant figures
B) An aqueous stock solution is 28.0% NH3 by mass and its density is 0.9 g/mL. What volume of this solution is required to make 1.50 L of 2.75 mol/L NH3(aq)? Give your answer in millilitres, accurate to three significant figures.
C) What is the minimum volume of 2.85 mol/L HCl(aq) required to dissolve 12.1 g Zn metal? The atomic weight of Zn is 65.39 g/mol. The unbalanced chemical equation for the reaction isZn(s) + HCl(aq) --> ZnCl2(aq) + H2(g)Enter your answer accurate to three significant figures
D) What volume of 2.09 mol/L H2SO4(aq) is required to completely neutralize 40.5 mL of 1.47 mol/L KOH(aq) ?Give your answer in mL, accurate to three significant figures
E) A 5.645-g sample of a mixture of Fe and Al is treated with excess HCl(aq). If 0.2122 moles of H2 are obtained, then what is the percentage by mass of Fe in the original mixture? Give your answer accurate to three significant figures
Write the equation for a nonspontaneous reduction-oxidation reaction involving the transfer
What is the maximum amount of ethanol (in millimoles) that could theoretically be produced under the following conditions?
We are asked to write the balanced equation when glucose is reacted with ammonium chloride + epichlorohydrin + isopropyl alcohol. What is the ultimate end product? Hopefully it is supposed to be some form of a quaternary ammonium radical attached to ..
Show that Ka Kb = Kw for a weak acid and its conjugate base OR a weak base and its conjugate acid, using the equilibrium expression for each.
If the Ka of a monoprotic weak acid is 1.4 × 10-6, what is the pH of a 0.33 M solution of this acid
A 2.00 gram sample of unknown gas is placed into a 296 mL flask at 17°C and found to have a pressure of 717 torr. What is the pressure (in kPa) if the sample is moved into a 200 mL flask at 352K
Benzene has a boiling point of 80.1 degrees celcius and a molal boiling point elevation constant of 2.53 degrees celcius/m. Calculate the boiling point of a solution containing 15.0 g of the non-electrolyte C6H4Br2 in 125 ml of benzene (sp gravity..
Gold miners then react the basic aqueous product solution from the above equation with Zn dust to get gold metal. Write a balanced redox reaction for this process.
Considering the electron configuration of aluminum, 1s2s^22p^63s^23p^1, which of the following represents the valence electrons only:
What is the percent ionization of a 0.230 M hydrosulfuric acid (H2S(aq)) solution
The weak acid HZ has a ka of 2.55*10^-4. What is the pH of a .075 M HZ? What is the pOH of .045 M HZ?
(a) How many mL of KOH will it take to reach the equivalence point? (b) Calulate the pH at the equivalence point. The Ka of HClO is 3.8x10^-8
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