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Use the atomic radius (70 pm) and density of neon at 25 °C and 1 atm (0.90 g/mL) to calculate the average density of a neon atom.
Using a liquid sample of Na that has a molar heat of fusion of 2.06 kj/mol calculate the number of moles in a liquid sample of Na if sample releases 41.4 kj when it freezes?
Each component contains different metals and minerals. The pebbles and shells can easily be separated from the sand. Which term or terms could be used to describe this sample of sand?
hydroxylamine is titrated to the equivalence point with 35.8 m of .15 M HCl. What is the pH at the equivalence point?
How much heat is absorbed by 100 mL of a dilute solution of NH4NO3 as it changes its temperature from 22.4 degrees C
Dehydration of 2-methyl-2-pentanol forms one major and one minor organic product. Draw the structures, including hydrogen atoms,
What is the density of hydrogen gas at 23.0^C and a pressure of 1640 psi?
diatomic oxygen to form nitric oxide and water vapor: 4NH3 + 5O2 > 4NO + 6H2O When 20.0 g NH3 and 50.0 g O2 are allowed to react, which is the limiting reagent? How much water is produced and how much is left of the excess reagent
What is the energy per photon of the lowest frequency of electromagnetic radiation that can be used to observe a gold atom with a diameter of 280 picometers.
Normalize the wave function x(a - x) y(b - y) over the range 0
The heat capactiy of the calorimeter is 1630 J/degrees celsius, and the inital temperature was 24.58 degrees celsius. What was the final temperature in degrees celsius?
A student weighed a piece of aluminum foil, rubber band, and a 250 ml flask and found it to be 107.520 grams. After a sample of unknown liquid is vaporized and condensed, the flask, aluminum foil and rubber band weighed 108.148 grams.
Calculate the heat of reaction for the same reaction where water is a gaseous product instead of a liquid.
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