EXERCISE 7.2 For each of the following reactions, write the molecular equation, the com-
plete ionic equation, and the net ionic equation.
a. Aqueous sodium sulfide is mixed with aqueous copper(II) nitrate to
produce solid copper(II) sulfide and aqueous sodium nitrate.
b. Aqueous ammonium chloride and aqueous lead(II) nitrate react to
form solid lead(II) chloride and aqueous ammonium nitrate.

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.

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.

girl imma just put my comment here because i need a couple point okurrttt