<h2>
Answer:
atoms</h2>
Explanation:
The given formula of the compound is 
The formula says
Every mole of
contains
moles of atoms of hydrogen.
Given that number of moles of compound is 
So,the number of moles of hydrogen atoms present is 
Since each mole has
atoms,
moles has
atoms.
<span>ZnCO3 is an inorganic compound and it contains two parts; one is cation(positive part of compound) whereas other is anion(negative part of compound). Here, </span>

<span> is cation and </span>

is anion. Hope this helps.
Answer:
depend on nature of matter
What would happen to the amount of matter on earth if mass were not conserved during changes of state?