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A sample of 35 millimole of Krypton gas expands reversibly and isothermally at 373K from 5.25 cubic centimeters to 6.29 cubic centimeters. The internal energy, U, increases by 41.75 J. Use the Virial equation of state with B=(-28.7)(cubic centimeters)/(mole) to calculate work, q, and delta H for this change.
If the copper is drawn into wire whose diameter is 8.50 mm, how many feet of copper can be obtained from the ingot? The density of copper is 8.94 rm{g/cm^3}.
A solution contained KIO3 and excess KI. 25 cm3 of this solution were acidified and the liberated I2 required 26.8 cm3 of 0.1 M Na2S2O3 for complete recaction.
Raidum-226 (atomic mass=226.025402 amu) decays to radon-224 (a radioactive gas) with a half-life of 1.6 x 10^3 year. What volume of radon gas a (25 degrees C and 1.0 atm) is produced by 1.0 g of radium in 5.0 days
Solid sodium reacts violently with water, producing heat, hydrogen gas, and sodium hydroxide. How many molecules of Hydrogen gas are formed when 48.7g of sodium are added to water?
What reagent could be used to reduce both the nitro and ketone functional groups in a single reaction?
The H2O molecule has a bond angle of 105. What type of atomic orbitals does oxygen use to form the two equivalent sigma bonds with H
The electron is passed down an electron-transport chain, at the end of which NADP+ is reduced. The reduction potentials of P700+, A and NADP+ at pH7 and 25 oC are 0.490V, -0.900V, and -0.350V respectively.
A gas made up of atoms escapes through a pinhole times as fast as gas. Write the chemical formula of the gas.
A sample of neon gas has a volume of 282 mL AT 160 degrees celsius. The sample is cooled at constant pressure to a volume of 685 mL. What is its new temperature?
The Greek mathematician Archimedes is credited with discovering how to verify the amount of pure gold in an irregularly shaped object (e.g., a crown) by placing it in water. How much water should be displaced by a pure gold object having a mass of..
in the reaction P4+5O2->2P2O5, how many moles of oxygen are consumed each time 0.500 mole of P2O5 is formed?
Br2 and ICl have similar molecular weights which compund has a higher boiling point specifically expalin your answer
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