Answer:
To what temperature must a sample of helium gas be cooled from 22.2 degrees C to reduce its volume from 1.00L to 100cm3 ?
Explanation:
Answer:
B) The molecular orbital formed is lower in energy than a hydrogen 1s atomic orbital.
Explanation:
When two atoms of hydrogen come close to each other , there is formation of molecular orbital . Due to overlap of 1 s orbital of one and 1 s orbital of another atom , two molecular orbitals are formed . One of these molecular orbital has energy less than 1 s atomic orbital . It is called 1 s sigma bonding molecular orbital . The other molecular orbital has energy more than 1 s atomic orbital . It is called antibonding molecular orbital . Two electrons occupy bonding sigma molecular orbital .
So , the statement that "the molecular orbital formed is lower in energy than a hydrogen 1s atomic orbital " is wrong .
The correct answer to
the question that is stated above is letter C.<span>compression and rarefaction
</span>
Longitudinal wave has two features which include:
A compression--<span> the part of the wave which is pressed together.
A </span>rarefaction--<span> the part of the wave that is the most spread apart.</span>
Vaporisation is a physical change because it is the change of state form from a liquid to a gas. Because vaporisation just changes the state of the substance and does not change the substance into a whole new one, it is a physical change