Strontium compounds are often used in flares because their flame colour is bright red. One industrial process to produce low-solubility

strontium compounds (that are less affected by getting wet) involves

the reaction of aqueous solutions of strontium nitrate and sodium

carbonate. Write the balanced chemical equation, total ionic equa-

tion, and net ionic equation for this reaction.

i think it's c. i'm not sure but i think so.

c-14 is carbon-14, or radiocarbon.   it is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons.

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.

може ли да зареждате повече информация, моля