Fenchone is a ketone found in oil of fennel. if fenchone has m+ = 152 and contains 1 double bond(s) and 2 ring(s); what is its molecular formula?
enter the formula in the form ch first, then all other atoms in alphabetical order; do not use subscripts.
the formula is case-sensitive.

C10H16O

Explanation:

Ketones are families of organic compounds with functional group of C=O, they have two organic radicals attached to the carbon atoms, hence ketones have a common formular RR'CO, where R and R' may be alkyl or aryl groups. The names of ketones alwas end in -one. Ketones or Alkanones are almost similar to Alkanals or Aldehydes.

From the question , the molecular weight of Fenchone is 152g/mol

The structural formula is as shown in the attachment

what's the

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.