It's a chemical change because it's changing the object's property.
So diffusion is inversely proportional to mass !
so as mass of the particle increases, diffusion decreases !
Answer:
See below, please
Explanation:
1 mol CH4 ——＞2 mol H2O=2x18 g/mol= 36 g
The question is not clear. You should tell us the concentration of CH4, methane.
Carbon dioxide sublimation
water evaporate
physical change is just change between solid/liquid/gas, other two are chemical changes
