In the expression 3H20, the 3 is a , while the 2 is a . A) coefficient: superscript B) coefficient: subscript C) superscript: subscript D) superscript: coefficient

The correct answer is  A) coefficient: superscript.

  In general:

2 is the coefficient of B, and 3 is the subscript of B.

 So, by comparing  with the given molecule,

3 = coefficient and 2 = subscript

Hence , the correct option is A.

To know more about:-

link

B) coefficient: subscript

Explanation:

Given

Required

What does 3 and 2 represents

On a general term:

In

And

So, by comparing with the general term,

Hence,

3 = coefficient and 2 = subscript

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.