Answer:
Volume and number of moles.
Step-by-step explanation:
- Gay-Lussac's law was found by Joseph Louis Gay-Lussac in 1808.
- It states that, for a given mass (no. of moles) and constant volume of an ideal gas, the pressure exerted on the sides of its container is directly proportional to its absolute temperature.
So, no. of moles and V are constant.
P ∝ T,
∴ P1/T1 = P2/T2.
- So, the right choice is: Volume and number of moles.