What does the half-life tell about a radioisotope? a. how long it takes for half of a sample to decay to another form b. how long it takes for half of the sample to begin to decay c. how long it takes a sample to lose half of its neutrons d. how long it takes a sample to become completely stable

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.

let that person have a turn to speak : )