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A gas is compressed in a cylinder from a volume of 20 L to 2.0 L by a constant pressure of 10 atm. Calculate the amount of work done on the system.
What mass of sodium chloride would need to be added to the blood to bring the sodium ion concentration up to 0.140m, assuming no change in blood volume?
At 25.0°C, a sample of Xe gas occupies 509 mL in a piston-cylider apparatus when the external pressure is 356 torr. At what pressure (torr) will its volume become 770 mL if the temperature does
What volume of oxygen at STP will be needed to react 3500 L of CO measured at 20 degrees C and a pressure of 0.953 atm?
An experiment requires 42.0 of ethylene glycol, a liquid whose density is 1.114 . Rather than weigh the sample on a balance, a chemist chooses to dispense the liquid using a graduated cylinder. What
Determine the molar amounts of NO, O2 and NO2 after a complete reaction. NO=? O2=? NO2=?
If the two flasks are connected through a stopcock and the stopcock is opened, what is the partial pressure of helium?
6NO2+2H2O=4(HNO3)+2NO. For this equation, how many grams of nitrogen dioxide are needed to react with 3.70mol of H2O? How many grams of nitrogen monoxide are produced when 2.18mol of H2O react? If 6
A solution containing Pt4+ is electrolyzed with a current of 3.50 A. How long will it take to plate out 80.% of the platinum in 0.50 L of a 0.010 M solution of Pt4+?
What volume of 0.240 M CaCl2 must be added to 335 mL of 0.189 M KCl to produce a solution with a concentration of 0.245 M Cl-? Assume that the solution volumes are additive.
Assume you prepare the sample corresponding to line 1 in the first table of the Calculations section. If the measured concentration of I3- turns out to be 1.30x10-5 M, what is the equilibrium coeffi
Calculate the final temperature when a 25.5 gram sample of ice at 0oC is placed into a styrofoam cup containing 116 grams of water at 71.9 oC.
Why do we assume that the extra electrons in I3- must be placed on the central Iodine atom to exceed the octet rule? Is there any reasoning/theory that discourages the electrons being placed on the no
If 12.6 grams of iron (III) oxide reacts with 9.65 grams of carbon monoxide to produce 7.23 g of pure iron, what are the theoretical yield and percent yield of this reaction? Be sure to show the wor
How many grams of dry NH4Cl need to be added to 2.40 L of a 0.400 M solution of ammonia, NH3 , to prepare a buffer solution that has a pH of 8.58? Kb for ammonia is 1.8*10 ^-5.
65.50 mL of 0.161 M HF is titrated with 0.1200 M NaOH. How many mL of the base are required to reach the equivalence point? (Ka for HF is 6.8 x 10-4)
Calculate the amount of heat (kcal) released when 50.0g of steam at 100 degrees celcius hits the skin, condenses, and coos to a body temperature of 37 degrees celcius.
what are the partial pressure in atm of each components of this mixture if it is held in a 10.0 L vessel at 14 degree Celsius.
Write a balanced equation for the reaction and determine how much oxygen in grams to the nearest 0.1 grams is formed by the complete reaction of 148.4 g of NA2o2.
65.50 mL of 0.161 M HF is titrated with 0.1200 M NaOH. What is the pH at the equivalence point? (Ka for HF is 6.8 x 10-4)
At 710. mm Hg, a sample of nitrogen gas occupies 625 mL. What volume does the gas occupy if the temperature remains constant and the pressure increases to 760. mm Hg?\
a 2.00 g peanut is burned in a bomb calorimeter containing 1400 g of water. the temperature of the water increases from 25 C to 30.25 C. What is the heat change, in Calories, for this peanut?
A bicycle tire is filled with air to a pressure of 100 psi at a temperature of 100 degrees C. Riding the bike on asphalt on a hot day increases the temperature of the tire to 58 degrees C. the volum
65.50 mL of 0.161 M HF is titrated with 0.1200 M NaOH. What is the pH after 65.50 mL of base have been added? (Ka for HF is 6.8 x 10-4)
The normal freezing point of mercury is -38.9 C and its molar enthalpy of fusion = 2.29/kj/mol. What is the entropy change of the system when 50g of mercury freezes at the normal freezing point?