Double and triple bonds form because:

a. one of the atoms in the molecule has more than eight valence electrons

b. single covalent bonds do not give all of the atoms in the molecule eight valence electrons

c. the ions involved have charges larger than one.

d. there is at least one hydrogen atom involved in the bond.

e. the atoms involved have high electronegativities.

B, Single Covalent bonds do not give all of the atoms in the molecule eight valence electrons.

Explanation:

In most cases, this is the reason why atoms form multiple covalent bonds. A prominent example would be . Nitrogen has 5 valence electrons each, meaning it needs 3 more electrons to fill its outer shell. Nitrogen can fill its outer shell by simply forming 3 covalent bonds with another Nitrogen atom.

the ideal gas law equation is as follows

pv = nrt

where p - pressure

v - volume

n - number of moles

r - universal gas constant

t - temperature

so if the pressure, volume and temperature are already known

we are left with n and r

since r is the universal gas constant that has a known fixed value then r too is known

so we are left with 'n'

once we know temperature volume and pressure

we can find the number of moles of gas present using the ideal gas law equation

this is not my own answer, this is an answer for the same question by the user blahblahmali. i do not claim ownership of this account.