A 25.0 mL sample of an acetic acid solution is titrated with a 0.175 M NaOH solution. The equivalence point is reached when 37.5 mL of the base is added. The concentration of acetic acid in the sample was M. A 25.0 mL sample of an acetic acid solution is titrated with a 0.175 M NaOH solution. The equivalence point is reached when 37.5 mL of the base is added. The concentration of acetic acid in the sample was M. 0.175 0.119 0.365 0.263 none of the above

= 0.2625M ≅ 0.26M (2 sig figs)

Explanation:

               HOAc                        +                    NaOH                 => NaOAc + H₂O

   25ml (Molarity of HOAc)       =\        37.5ml(0.175M NaOH)

Molarity of HOAc = 37.5ml(0.175M NaOH)/25ml

= 0.2625M ≅ 0.26M (2 sig figs)

that tool would be a compass

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.