A. A lab student analyzed his/her cool nickel-en complex for ethylenediamine, en, content. A 0.515 g sample of the synthesized Ni-en complex was dissolved in about 50 mL of water and titrated with 0.186 M HCl (aq). Endpoint required 20.16 mL of the HCl (aq). What is the mass (in grams) of en in the Ni-en complex analyzed?B. Continuing on with the analysis of the Ni-en complex as found in question (a), 40 mL of dimethylglyoxime, DMG, solution was added to the titrated nickel-en complex solution. The resulting beautiful red complex, Ni(DMG)2 was collected by filtration and found to weigh 0.487 g. What is the mass (in grams) of Ni in the Ni-en complex analyzed? C. Determine the empirical formula of the complex synthesized in questions (a) and (b) above.

answer: they produce more slow than unicellular organisms.

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.