Jojo and Barbara put a beaker of water into the freezer and take it out 24 hours later to find a solid. What is this an example of?

A. chemical change
B. transmutated inverse reaction
C. physical change
D. sublimation

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.

d) a person who learns about the world by observing it.

explanation:

scientist are people who discover why and how things are done and made in the world.