You analyze a sample of volatile liquid propyl acetate (c5h1002) by placing a small volume of it in a round-bottomed flask with a volume of 555.0 ml and an evacuated mass of 127.133 g. you submerge the flask in a water bath at 100.0°c and allow the volatile liquid to vaporize. you then cap the flask and remove it from the water bath. what will the mass of the 555.0-ml flask be after evaporation of the propyl acetate? (assume the pressure in the laboratory is 1.000 atm.)

the answer is a and have a great day

b. examine and describe cells

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.