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Determine the volume of 0.1 M NaOH that is required to React with all the acetic acid in a solution containing 25.0 mL of 0.0500 M acetic acid, 25.0 mL of deionized water, and 0.205 grams of sodium ac
What type of intermolecular forces are expected in a NICl2 molecule?
Comment on the situation in this case. is the positive charge of hydronium ion on the least electronegativity atom? is this reasonable? is there a choice?
Kp = 1.78 at 250ºC for the decomposition reaction, PCl5(g) ? PCl3(g) Cl2(g). Calculate the percentage of reactant that remains if 10.0 moles of starting material are placed in a closed vessel at
An aqueous CaCl2 solution has a vapor pressure of 82.1 mmhg at 50 C . The vapor pressure of pure water at this temperature is 92.6 mmhg What is the concentration of in mass percent?
In an ethanol-chloroform solution in which the mole fraction of ethanol is 0.20, the total vapor pressure is 304.2 torr, and the mole fraction of ethanol in the vapor is 0.138. Calculate the activity
What is the final temperature of the solution (in )? Assume that the specific heats of both pure and the solution are the same, 4.18 .
An inflated balloon has a volume of 0.55 L at sea level (1 atm) and is allowed to rise to a height of 6.6 km, where the pressure is about 0.40 atm. assuming that the temperature remains constant, w
How much energy (heat) is released when 0.9 moles of H2 reacts with 0.5 moles of Cl2 to create HCl(g) if the ΔHrxn = –184.6 kJ?
Where the temperature and pressure are -23 Celsius and 3.00 x 10^-3 atm, respectively. Calculate the final volume of the balloon.
The pollutant has a reaction rate coefficient K of 0.25/day. Assuming the pollutant is well mixed in the lake, find the steady-state concentration of pollutant in the lake.
Write the net ionic equations for the precipitation reaction or reactions that occur. What are the spectator ions in the solution?
5.0 gram sample of KBr at 25 degrees Celsius dissolves in 25 mL of water also at 25 degrees Celsius. The final equilibrium temperature of the resulting solution is 18.1 Celsius. What is the enthalp
Boron has two naturally occuring isotopes,, 10B (19.9%) and 11B(80.1. althought the b2 molecule doesn not exist naturally on earth, it been been produced in the laboratory and been observed in star
A 295- flask contains pure helium at a pressure of 757 . A second flask with a volume of 460 contains pure argon at a pressure of 713. What are the partial pressures of helium and argon? What is th
How many moles of excess reagent (calcium hydroxide) are left over? Calculate how many moles of calcium hydroxide could be converted by the HCl available, then subtract from your answer to part b.
A steel tank containing helium is heated to 555?C. If you could look into the tank and see the gas molecules, what would you observe?
A balloon contains 0.140 g of helium at a pressure of 1.00 atm. At what temperature will the balloon have a diameter of 12.8 centimeters. Assume the balloon takes the shape of a sphere. Give your answ
What is the total molar concentration of ions in CH3OH
Calculate the amount of heat required to heat a 43 sample of ethanol from 14.0 to 19.0. Specific heat capacity of ethanol is 2.42 .
A graduated cylinder contains 110. mL of water. A 10.0 g piece of iron (density = 7.86 g/cm3) and a 18.9 g piece of lead (density = 11.3 g/cm3) are added. What is the new water level in the cylinde
The proton NMR spectrum of a compound gives a singlet at ? 2.10 and ? 2.56 in a ratio of 3:2, respectively. Which compound below is the best match for the spectrum?
What mass of water would need to evaporate from your skin in order to dissipate 1.7 × 105 J of heat from your body? H2O(l) → H2O(g) ΔHvap = 40.7 kJ/mol
Calculate the mass of nitrogen dissolved at room temperature in an 94.0 home aquarium. Assume a total pressure of 1.0 and a mole fraction for nitrogen of 0.78.
Two of the chemists will report, within experimental error, the same temperature change for HCl/NaOH reaction. identify the two students and explain.