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A balloon filled with helium gas is found to take 6 hours to deflate to 50% of its original volume. How long will it take for an identical balloon filled with the same volume of hydrogen gas (instead of helium) to decrease its volume by 50%?
Partial pressure of argon = ( ? )atm. Now suppose that 7.00 moles of xenon are added to the vessel without changing the volume or temperature. What is the partial pressure of argon now
(a) When 36.0 g H2O are mixed with 67.0 g Fe, which is the limiting reagent? (b) What mass in grams of black iron oxide is produced?
the calorimeter itself absorbs a negligible amount of heat, calculate combustion eneergies (change of energies) for benzene in both kj/g and kj/mol.
how much heat in kilojoules is evolved or absorbed in each of the following reactions?a burning of 15.5g of
Explain how much heat in kilojoules is required to warm 10.0 of ice, primarily at -15.0, to steam at 125. Define the heat capacity of ice is 2.09 and that of steam is 1.84.
Determine how many of the isomers will have a parent name of heptane. (I know the answer is 3, but is there a formula to easily figure it out or how do you go about knowing when you've drawn enough molecules to determine
Problem- The molar heats of fusion and vaporization of a certain substance are 2.48 kJ/mol and 8.51 kJ/mol, and its melting point and boiling point are -181 degrees Celsius and -130 degrees Celsius, respectively. Calculate the entropy changes for ..
Suppose you used excess sulfuric acid in all the flasks. How many moles of CO2 would be released in flask 7? The molar mass of sodium carbonate is 105.99 g/mol.
What are some carbocylic reactants and what do they react with?
you are asked to go into the lab and prepare an acetic acid-sodium acetate buffer solution with a ph of 4.40 plusmn
What is the pH of a 0.3656 M solution of the sodium salt of a weak acid with a pKa of 3.745? The answer is not pH = pKa + log(salt)
a saturated solution of barium chloride at 30c contains 150 g water. how much additional barium chloride can be
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