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12.5 g of KCl (MM = 74.55 g/mol) is dissolved in enough water to make 675 mL of solution. Calculate the molarity of the KCl solution.
How many milliliters of a 0.56 M HCl solution do you need to obtain 0.0046 mol of HCl?
Consider a stoppered flask containing benzene, iodine, and air, which has reached equilibrium at 298K. Which one of the following statements concerning the system at equilibrium is true?
What is the value of K_sp for tin(II) sulfide, given that its solubility
H2O is amphoteric meaning it can act as both a Bronsted acid and a Bronsted base.Show that H2O really is amphoteric by writing the relevant equations
describe the change in conductivity as the concentration of the NaCl solution was increased by the addition of NaCl drops
Calculate w (in kJ) when 390 g iron (III) oxide (MM = 159.7 g/mol) reacts with excess carbon to produce carbon dioxide gas at 426 K.
A mixture of Ar and N2 gases has a density of 1.416 at STP. What is the mole fraction of each gas?
Consider 2 Al + 6 HCl → 2 AlCl3 + 3 H2 , the reaction of Al with HCl to produce hydrogen gas. This reaction has a yield of 82.5 percent. How much HCl are needed to produce 14.0 L of H2 at 351 K and 1.11 atm ?
A 6 cm string is fastened at both sides is plucked. What is the wavelength of the n = 3 standing wave? How many nodes does it contain.
Calculate the pH of each of the following solutions. (a) 0.500 M HONH2 (Kb = 1.1 10-8) (b) 0.500 M HONH3Cl
Write the expression for the reaction rate in terms of d[NOCl]. c. The concentration of NOCl drops from 0.580 M to 0.238 M in 8.00 min. Calculate the average rate of reaction over this time interval.
What is the entropy change if two mole of liquid water is heated from 20 C to 100 C under constant pressure? Cp=75.5 J/mol*K over this temperature interval
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