Answer:
Sunlight
Explanation:
Photosynthesis is the process where by plants manufacture their own food through conversion of carbon(iv)oxide and water in presence to sunlight to produce glucose and oxygen as by product.
The reaction is photo-catalyzed and would only take place in the presence of sunlight.
6CO₂ + 6H₂O + sunlight → C₆H₁₂O₆ + 6O₂
So diffusion is inversely proportional to mass !
so as mass of the particle increases, diffusion decreases !
Iron filings can be attracted by the magnet whereas salt can not. So the mixture can be separated by a magnet
