Answer:a formula giving the number of atoms of each of the elements present in one molecule of a specific compound.
Explanation:
Add water to mixture to dissolve sugar then filter. sugared water will be the filtrate while the salt & iron fillings will be the residue. use magnet to attract iron fillings and remaining will be salt.
Composting is not a technological way of improving air quality.
I hope this helps!
I think it is because it has an even number of valence electrons.