Three Small part chem question! Please help! I don't understand!
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WITH PICS

1. write the charges for each element/ion in this question. Treat NO3 as a singer thing with a charge of -1.

[ ] [ -1] [ ] [ ] [ -1]
Pb(NO3)2 + KI → PbI2 + 2KNO3

2. what did you notice about the charges for each element or ion in this reaction

3. Would you consider this a redid reaction? why or why not explain.

i don,t know so just answer mine

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.

pv=nrt

explanation: