2. The rate constant of a first order reaction is 66 s-1. What is the rate constant in units of minutes

3960/min

Explanation:

The rate constant is expressed in seconds (s): 66 s⁻¹ = 66/s

We know that: 1 min = 60 s

Conversion factor = 60 s/1 min

We multiply the rate constant by the conversion factor to obtain the rate constant expressed in units of minutes:

rate constant = 66/s x 60 s/1 min = 3960/min

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.