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How many grams of sodium lactate should be added to 1.00 of 0.150 lactic acid to form a buffer solution with = 4.00? Assume that no volume change occurs when the sodium lactate is added.
What is the spectator ion for the chemical formula Cl2 + NaBr=Br2 + NaCl
A 7.5- sample of hydrogen gas completely reacts with 60.0 of oxygen gas to form 67.5 of water. Is the following data set on chemical changes consistent with the law of conservation of mass?
What is the maximum volume of nitrogen measured at 1.00 atm and 37°C that could dissolve in the diver's blood plasma at a depth of 93 m, where the pressure is 10.0 atm?
Calculate the mass of oxygen dissolved in a 5.00 L bucket of water exposed to a pressure of 1.13 atm of air. Assume the mole fraction of oxygen in air to be 0.21 and the Henry's law constant for ox
The product of one-eleventh and the volume of the water. If 979 cubic centimeters of water is to be frozen, what will be the volume of the ice that will be formed?
A glucose solution contains 56.0 {rm g} of glucose ({rm{C}}_6 {rm{H}}_{12} {rm{O}}_6) in 440 {rm g} of water. Compute the freezing point and boiling point of the solution. (Assume a density of 1.00
At 700.°C, the total pressure of the system is found to be 3.45 atm. If the equilibrium constant KP is 1.52, calculate the equilibrium partial pressures of CO2 and CO.
Assume the Pacific Ocean has a surface area of 1.7 x 108 km2 and an average depth of 3900 m. Calculate the volume of water in the ocean in liters
Suppose a cup of coffee at the campus coffee shop is $1.50, and a cup of hot tea is $1.25, and a student's beverage budget is $20 per week. What is the most cups of tea the student could buy?
THE TEMPERATURE OF THE BALLOON IS INCREASED TO 38.0oC as it expands to a volume of 998L, the presure remaining constant. Calculate q, w, and delta E for the helium in the balloon.
Concentrated hydrochloric acid is 38% HCl by weight and has a density of 1.19 g/mL. A solution is prepared by measuring 63 mL of the concentrated HCl, adding it to water, and diluting to 0.900 L. Ca
If the total pressure in the flasks is 320 torr after the stopcock is opened, determine the initial pressure of N2 in the 1.00-L flask.
A solution of ammonia and water contains 1.40×10^25 water molecules and 5.30×10^24 ammonia molecules. How many total hydrogen atoms are in this solution?
Find the heat of combustion in kJ/g for each gas. These values are valid at 25°C, where the water produced by the reaction is in the liquid state.
Is it possible to use methylene blue to determine the concentration of ascorbic acid in orange juice?
Dinitrogen pentoxide, N2O5, decomposes in the gas phase to form nitrogen dioxide, NO2, and oxygen gas, O2. The reaction is first order in dinitrogen pentoxide and has a half-life of 2.81 hours at 25
If iodine gas reacts with excess fluorine gas to produce 7.575g of iodine pentafluoride gas, what was the pressure of the iodine gas before reacting if it was kept in a 1.5L flask at 298 k.
A sample of hydrogen gas was collected over water at 36°C and 855 mm Hg. The volume of the container was 6.50 L.
an electron is confined to a one dimensional box of length l it falls from the second energy level to the ground state and releases a photon with a wavelength of 322 nm. what is the length of the bo
Suppose you have a new thermometer called the X thermometer. On the X scale the boiling point of water is 130 degrees X and the boiling point of water is 10 degrees X. At what temperatures will the
A 25.0-mL sample of 1.00 M NH3 is titrated with 0.15 M HCl. What is the pH of the solution after 15.00 mL of acid have been added to the ammonia solution? Kb = 1.8 × 10¯5.
A solution is prepared by mixing 50.0 mL of 0.17 M Pb(NO3)2 with 50.0 mL of 1.9 M KCl. Calculate the concentrations of Pb2+ and Cl ‾ at equilibrium. Ksp for PbCl2(s) is 1.6 multiplied by 10-5.
Positrons cannot penetrate matter more than a few atomic diameters, but positron emission of radiotracers can be monitored in medical diagnosis. Explain