As a substance changes phase from a gas to liquid to solid:
a- the spacing between molecules increases.
b- it's density generally increases.
c- the spacing between molecules is not affected.
d- it undergoes chemical change.

The correct answer its:

its density generally increases

hope it helps

can I get rhe breainliest?

kdkdkrnmcnc

explanation:

wisjndnfnnjjdjdjxn

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.