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You are given 10g of benzoic acid. Calculate the amount of water that you would use to re-crystallize the sample. The solubility of benzoic acid in water is 6.8g/100mL at 95Cand 0.3g/100mL at 25C.
Write down a balanced chemical equation that shows the preparation of synthesis gas (carbon monoxide and hydrogen) from oxygen and methane.
The age of wine can be determined by measuring the trace amount of radioactive tritium, the concentration of which diminishes by a first order radioactive decay with a half life of 12.5 years once t
What would be the concentration of H3O+ at the end point when 0.1 M NH3 solution is titrated by0.2 M HCl solution.
Determine the order of decreasing freezing points of the four solutions? (i) .5M H2SO4, (ii) .5Mglucose, (iii) .5M NaCl, and (iv) .5M CaCl2
The alum is soluble and releases aluminum, potassium, and sulphate ions. Discuss, based on the fact that Al+3 form a weak base with hydroxide, how baking powder works. Be sure to incorporate how hy
When the same cell is filled with 0.02M NaCl solution there assistance at the same temperature is found to be 1100Ω. The resistance of a conductivity cell with 0.1M KCl solution is found to be
Write down a balanced net ionic equation for the reaction that takes place during the titration. What is the pH of the solution before any HBr is added? Discuss what volume of HBr is needed to reac
In the monochlorination of phenol, determine the numbers of possible isomers can be obtained ?Determine the mass of FeS produced when the 9.42g of Fe reacts with the 8.50g of S.
Determine how many J of heat are required to raise the temperature of 62.0g of ethylene glycol from 15.2 C to 40.8 C when the specific heat of ethylene glycol is 2.42J/g-K.
Assuming that the pH is controlled by the carbonate system, i.e., no anthropogenic acid gases are present in the atmosphere; the average pH of precipitation in rural areas is 5.10.
If the electrolyte of an electrolysis cell is titrated against 0.1 M NaOH , what would be the reading of the ammeter at the end point ?
Determine the wavelength of light emitted when an electron goes from the n = 7 to the n = 2 energy level in a hydrogen atom.
Draw an energy level diagram for the electron in the hydrogen atom and use bohr's energy expression, E = -2.18 x10-18 J (1/n2), to determine the energies of the n =2 and n = 7 levels.
Write down a balanced equation that shows the preparation of synthesis gas (carbon monoxide and hydrogen, i think) from oxygen and methane.
Determine the concentration equilibrium constant Kc if the temperature is 300K if the value of the pressure equilibrium constant kp for the reaction: N2O4 ↔2NO2(g) at a certai
Calculate the concentration of a potassium hydrogen phthalate (KHP) solution that was made by dissolving the 3.823 g of KHP in a 250.0 mL volumetric flask?
Determine the potential of a silver cathode vs the standard calomel electrode after the addition of 5,00; 10,00; 20,00; 40,00and 60 ml of 0.0800 M AgNO3 to 40,00 ml of 0.0900 MKSeCN.
What is the charge of the electron in zirkombs? A chemist in a galaxy far away performed the Millikan oil drop experiment and got the following results for the charge on various drops.
A bottle of 3% H2O2 is left open and allowed to reach equilibrium with the atmosphere. Calculate the concentration of H2O2 in this solution at equilibrium.
Determine the molar concentration of the calcium ion in the resulting solution? 15.00 mL of a 0.127 M CaCl2 solution are mixed with25.6 mL of a .137 M Ca (NO3)2 solution.
How many lead atoms are in a cube of lead that has a volume of 2.00cm cubed, if the density of lead is 11.3 g/cm cubed? A lead atom has a mass of 3.14 x 10 to the negative 22nd g.
Determine the pressure equilibrium constant Kp for the reaction at this temperature. Calculate the partial pressure of chlorine in the vessel?
X gm of a metal (eq wt 12) was completely dissolved in the 100cc of N/2 HCl. The volume was then made up to 500cc of this dilute acid. 25ml of this acid required 1705cc of N/10 NaOH for complete ne
Explain what mass of acetic anhydride is required to completely consume the1.00 * 102 g salicylic acid?Determine the maximum mass of aspirin that could be formed in this reaction?