Compound e has a molecular formula of c7h6o3. what is the unsaturation number (un) or double-bond equivalent (dbe)?

Unsaturation number (un) or double bond equivalent (dbe) can be calculated as:

=C+1-(H/2)

Where C=number of carbon atoms

H=number of hydrogen atoms

So here the compound is C7H6O3

C=7

H=6

Presence of oxygen will not affect the DBE.

So DBE= 7+1-(6/2)

=5

the role of the microscope world in creating new materials .

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

if it's not useful, feel free to report for mistake in answer.