Oda gas is moved from a large container to a small container but it’s temperature and number of moles remain the same, what would happen to the pressure of the gas? a) it would increase b) it would be halved c) it would stay the same d) it would slightly decreases

Answer is: A) it would increase .

Boyle's Law (the pressure-volume law): volume of a given amount of gas held at constant temperature varies inversely with the applied pressure when the temperature and mass are constant.  

p₁V₁ = p₂V₂ (the product of the initial volume and pressure is equal to the product of the volume and pressure after a change).

For example:

p₁ = 1.2 atm; starting pressure.

V₁ = 2.0 L., starting volume.

V₂ = 1.0 L; final volume, smaller than starting volume.

p₂ = ?; final pressure.

1.2 atm · 2 L = p₂ · 1 L.  

p₂ = 1.2 atm · 2 L / 1 L.  

p₂ = 2.4 atm.

When volume goes up, pressure goes down.  

When volume goes down, pressure goes up.