2. In the first demonstration, a sodium iodide solution is mixed with a lead Il nitrate solution
to form a bright yellow insoluble solid precipitate. Given the word equation, write out the
balanced equation.
Use: Sodium Na+, Lead Pb
iodide 11 nitrate NO,
Remember to use the charge to neutralize any formula you write. Then balance the equation
sodium iodide ng
lead Il nitrated
lead II iodide) + sodium nitrate
(a
balanced equation? :

the answer is b. dilution

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.