Achange in the properties of matter that does not change the identity of the substance is:

a: a chemical change

b: a physical change

c: a nuclear change

d: a covalent change

The correct answer is option B.

Explanation:

Chemical change is defined as the change of a substance which is observed during a reaction where the chemical composition identity of the substance gets changed.

Physical change is defined as the change which can be measured and whose value describes the state of physical system. For Example: State, density etc.

Nuclear change is defined as change when a nucleus of an undergoes fission or fusion that is combining of neutrons and protons to form new heavier atom.

the temperature of the gas, in k, not celsius.

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.