2. list at least two chemical reactions that resulted in a white precipitate. for these reactions list the possible chemical name of the precipitate. what do these reactions (and the others with white precipitates) have in common?

3. of all the reactions you performed, how many resulted in a precipitate and how many did not? make a general statement about the interaction of aqueous ionic compounds, using the term double-displacement reaction.

has anyone done this i only know the first one that i did not post here.

i'm pretty sure its b i might be wrong though!

hurricanes form when warm, moist air from the ocean surface quickly rises into the atmosphere and forms storm clouds and rain. when the clouds are formed, heat is released which warms the cool air in the upper regions of the atmosphere so that the cycle can continue. which two phases of the water cycle are repeated in this process?

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.

the answer your looking for is c).