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A 2.00 L sample of gas originally at 25 °C and pressure of 400 torr is allowed to expand
to a volume of 5.00 L.
If the final pressure of gas is 585 torr, what is the final temperature in K?
At 27 ºC a gas occupies a volume of 600 cm3. What volume does that gas occupy at
227 ºC, assuming that pressure remains constant?
Give the name of the gas law associated with this scenario.
Write the reversible reaction for PbI2 breaking into its constituent ions
What are characteristics of central nervous system and peripheral nervous system?
calculate the binding energy per atoms, per nucleon, and per mole for a maganese-55 atom measured mass 54.938047 u
How can I know in which atom that the reaɡent atom will attack the nuleophilic?
Polystyrene can be made more rigid by polymerizing with divinylbenzene (shown below). How does the divinylbenzene make the polymer more rigid? (2 Marks)
Draw the structure of the following compound:

Methanoic propanoic anhydride

Halogen atoms form diatomic molecules with single covalent bonds. Shown in the graph are the atomic radii of three halogen elements and the bond energies of their diatomic molecules. What is the main reason for the variation in bond energy between Cl2 and I2?

A )Bonds become weaker when the separation of nuclei and bonding electrons increases, because the electrostatic attraction between them decreases.

B )Bonds become stronger because the separation of bonding electrons increases, reducing the electrostatic repulsion between them.

C)Bonds become stronger when the separation of nuclei and bonding electrons increases, because the electrostatic repulsion between them decreases.

D)Bonds become weaker when the separation of nuclei increases, because the electrostatic attraction between them decreases.

E)Bonds become stronger because the separation of nuclei increases, reducing the electrostatic repulsion between them.


element Of (3,1,0, +1/2)


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