Which example has 1.8×10^24 hydrogen atoms?

1 mole of hydrogen gas (h2)

1 mole of ammonia (nh3)

1 mole of peroxide (h2o2)

1 mole of water (h2o)

NH₃

Explanation:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

The number 6.022 × 10²³ is called Avogadro number.

For example,

one mole of NH₃ have 3 hydrogen atoms. Thus

3 × 6.022 × 10²³ atoms

18.066 × 10²³ atoms

1.8 × 10²⁴ atoms

while all other options are incorrect because all have two hydrogen atoms.

2× 6.022 × 10²³ atoms

12.044 × 10²³ atoms

1.2 × 10²⁴ atoms

i dont know the answe

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.