Let's say we have two flasks both connected by a valve. In flask A, there is 4.0 L of CO2 gas at a pressure of 0.75 atm, in flask B, there is 2.25 L of Cl2 gas at 3.6 atm, and the valve in the center is initially closed at a constant temperature. When the valve is opened, what will be the resulting pressure of the Cl2 gas? Show all applicable work and report your answer to the correct number of significant figures as well as with the correct units.

it can be observed without changing the identity of the object.

it depends on what substance you're talking about as well as many other factors. in quantum mechanics, the observation of particles affects the observers ability to measure certain properties. for example: you can know the velocity of a particle, but you can't know it's position; or you can know it's position, but not it's velocity. it's like trying to find out where a grain of sand is by throwing other grains of sand at it. once you find out where it is, it's been moved. it's also like trying to find an answer to the question of whether or not a tree falling in a forest makes a sound if nobody is there to hear it. paradoxically, the only way to find out is to be there and hear it.

a is the correct answer

the answer is d.) potassium