Pre-lab setup (4 points): 1. What is your independent variable?
2. What is your dependent variable?
3
.
What should you keep constant?
4. What tools do you need to conduct your experiment?

1. Independent -  The thing that you change and measure.

2. Dependant - The change that happens due to the independant variable.

3. The control variable.

4. Things that you will need during your experiment will usually be given to you on a paper with a list of supplies you will need and sometimes a brief summary of the method.

Hope this helps :)

sry but any answer choices

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.