LOT OF POINTS PLEASE HELP ASAP NEED. HELP ASAP NO ROCKY PLS RN I WILL GIVE BRAINLIEST Identify one or more choices that best complete the statement or answer the question.

Formulas of pairs of compounds of nitrogen oxides are given below. Which pairs are consistent for a given mass of nitrogen such that the first compound contains twice the mass of oxygen as the second compound?

a. NO4:NO2
b. NO4:N2O
c. NO2:NO
d. NO:N2O

a., b., and d. only

a. and c. only

a., c., and d. only

c. and d. only

i'm assuming that it's c.) red bank..

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.