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A sealed balloon is filled with 1.40 L of helium at 23°C and 1.00 atm. The balloon rises to a point in the atmosphere where the pressure is 200. torr and the temperature is -26°C. What is the change in volume of the balloon as it ascends from 1.00 atm to a pressure of 200. torr?
549 mL of hydrochloric acid is exactly neutralized with 292 mL 0.450 M calcium hydroxide solution. What is the concentration of the acid solution?
Use the activity series to determine if a single replacement reaction can be seen to occur. If a reaction occurs, write the net ionic equation. a) Cobalt metal in a barium iodide solution b) Tin metal in a copper bromide solution
for the voltaic cells that you measured that used silver and copper provide the reaction that represents the voltage
Iron has a reported average atomic mass of 55.85 amu. If iron has two isotopes, one of which has 29 neutrons and an isotopic abundance of 57.50%, what is the mass of the other isotope?
Calculate change in heat when 18.80 g of water vapor steam at 100 C condenses to liquid water and then cools to 20.5. the molar heat capacity of water is 75.3 J/ (mol x C). Delta Hvap= 40.67 KJ/mol.
how many pi bonds are there in a molecule of crotononitrile?how many sigma bonds are there?how many nonbonding valence
a 20 ml solution of ti2 40 mm can be oxidized by reacting with iron ions from fecl3. a titration is performed with a
there are some given substances likenbsp kohnabr crpo4 rbcl pboh2 lino3nbspnbsp you just need to find out which
Given a mean free path, comment on the appropriateness of using the ideal gas law to determine the number density of a sample at a critical point.
Suppose a vessel contains 6.4 g of NH3, how many grams of O2 are needed for a complete reaction?
The rate constant k for a first order reaction is 1.36 * 10 -3 s -1 at 90 degrees Celcius and the activation energy is 78.4 kJ/mol. What is the rate constant for this reaction at 50 degrees Celcius?
Calculate k, Calculate also how long it would take for half of A to react. assume pseudo first order with k'=k[OH-], since [OH-] is in great excess.
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