In an experiment, theresa measured 15.00 ml of water. she must have used a flask that had markings every 25 ml. beaker that had markings every 20 ml. transfer pipet that had markings every 0.1 ml. graduated cylinder that had markings every 1 ml.

The correct answer is transfer pipette that had markings every 0.1 mL

Explanation:

Flask, beaker , pipette and graduated cylinder are the apparatus that are used in the lab to measure the volume of a chemical.

For an experiment, the measurement of chemical used must be precise and for that purpose, pipette is used.

All the other apparatus does not give precise measurements and hence cannot be used for measuring a chemical that has to be used in an experiment.

Hence, the correct answer is transfer pipette that had markings every 0.1 mL

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.