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The solubility of O2(g) in water is 4.43 mg O2/100 g H20 at 20 degree Celsius when the gas pressure is maintained at 1 atm. What is the molarity of the saturated solution?
A certain "promenade" calls for the formation of groups, with each group consisting of one man with two women. a)How many groups could be formed? b) which sex is in excess? By how much?
Calculate the volume of 3M aqueous sodium hydroxide needed to neutralize the acetic and phosphoric acids in the synthesis of acetylferrocene?
Could 131 g of Xe gas in a vessel of 1.00 dm^3 exert a pressure of 20.0 atm at 25 C if it behaved as a perfect gas? If not, what pressure (in atm) would it exert?
A 255- flask contains pure helium at a pressure of 753 . A second flask with a volume of 465 contains pure argon at a pressure of 716 .If the two flasks are connected through a stopcock and the sto
Calculate the amount of heat transfered when 24.0 g of CH3OH decompose at constant pressure. delta H is 126.4 kJ
I1 = 589.5 kJ/mol, I2 =1145 kJ/mol, I3= 4900 kJ/mol, I4 = 6500 kJ/mol, and I5 = 8100 kJ/mol. Which one of these five elements is most consistent with this pattern of ionization energies?
Find the corrected flask volume using the following: volume of water needed to fill flask=996mL capillary tubing radius=1.5mm length of tubing below the stopper=30cm.
In general, most substances melt at a higher temperature as pressure is increased (except water). Justify this behavior from your knowledge of the variation of chemical potential with pressure and
Determine the number of representative particles in each substance:
NiCl2 solution calculate the concentration, in moles per liter , of each of the ions present after mixing . assume that the volumes are additive.
A 1.30 sample of dry ice is added to a 760 flask containing nitrogen gas at a temperature of 25.0 and a pressure of 715. The dry ice is allowed to sublime (convert from solid to gas) and the mixtur
Nitric oxide, NO, is made from the oxidation of NH3, and the reactions is represented by the following equation 4NH3+5O2 --> 4NO + 6H20 What mass of No can be produced from 8.61 grams of NH3?
Equal mass of water and ethylene glycol are mixed. What is the vapor pressure of this mixture at 100.C? The molar masses of water and ethylene glycol are 18.02 g/mol and 62.07 g/mol.
Write the expression for the equilibrium constant, Kc, for the following chemical reaction.
A volume of water was delivered using a buret and experimentally determined to have a mass of 2.00-g. What was the final volume of water on the buret if the inital was 0.44-mL? [assume the density
A gas in a sealed container has a pressure of 125 kPa at a tempurature of 30.0 degrees celcius. If the pressure in the container is increased to 201 k Pa, what is the new tempurature?
How many grams of dry need to be added to 2.30 of a 0.400 solution of ammonia, to prepare a buffer solution that has a of 8.80? for ammonia is?
Determine the functional form of Phi(t) and the frequency of a pendulum bob whose mass is m and is attached to a massess rod of length l.
Two moles of a gas are compressed isothermally and reversibly at 300 K from an initial volume of 10 dm3 to a final volume of 1 dm3. If the equation of state of the gas is P(Vm-b) = RT, with b = 0.0
What is the approximate pH of a solution prepared by adding 20 mL of 0.10 M NaOH to 200 mL of 0.10 M HCl?
Calculate the molarity of the solution. How many grams of KNO3 are needed to make 450 mL of a solution that is to contain 5.50 mg/mL of potassium ion?
If the open-tube manometer in the figure below contains a nonvolatile silicone oil (density = 1.30 g/cm3) instead of mercury (density = 13.6 g/cm3), what are the pressures in the flask as shown in
Write the expression for the equilibrium constant, Kc, for the following chemical reaction?
Palladium crystallizes with a face-centered cubic structure. It has a density of 12.0 g/cm^3, a radius of 138 pm, and a molar mass of 106.42 g/mol. Use these data to estimate Avogadro's number in a