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A helium-filled weather balloon has a volume of 714 L at 23 oC and 750 mmHg. It is released and rises to an altitude of 3.78 km, where the pressure is 546 mm Hg and the temperature is -2oC. The volume of the balloon at this altitude is
A chemist dissolves 0.9 g of an unknown monoprotic (one acidic H) acid in water. She finds that 14.6 mL of 0.426 M NaOH are required to neutralize the acid.
A tire manufacturer has a 60,000 mile warranty for tread life. The manufacturer considers the overall tire quality to be acceptable if less than 8% are worn out at 60,000 miles.
what is the molarity of a solution that contains 5.2g urea (molecular weight = 60 amu) in 250g of benzene?
Describe the impact of time of exposure on the amount of radiation you receive. If you are exposed for three times as long do you feel 1/3 the amount of radiation, three times the amount of radiation
How many L of N2 gas are produced at STP when the airbag inflates if the airbag contains 132g of sodium nitride?
What observed rotation is expected when a 1.02 M solution of (R)-2-butanol is mixed with an equal volume of a 0.510 M solution of racemic 2-butanol, and the resulting solution is analyzed
Examine the nuclide neptunium-237. The nuclide has a measured nuclear mass of 237.048166 amu. Determine the binding enery in kj, kj/mole
If you combine equal volumes of the following solutions, which combinations will result in the desired buffer? Why are the answers are 0.20 M CH3CO2H + 0.10 M NaOH and 0.20 M Na(CH3CO2) + 0.10 M HCl
A red laser pointer emits light with a wavelength of 660. What is the frequency of this light? 2.What is the energy of one of these photons?
If a saturated solution of NH4NO3 at 70 °C is cooled to 10 °C, how many grams of solute will separate if the quantity of the solvent is 94.0 g?
The four molecular p orbitals of the four carbon atoms can be lined up parallel in order to create four new molecular orbitals. The electrons in the new molecular orbitals benefit because they are not confined to just one atom.
Disregarding any other losses and treating the animal as a closed system, what was the change in internal energy of the animal?
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