Which of these is an example of physical change?
1) water evaporates
2) gasoline ignites
3) a nail rusts
4) wood rots

There is one girl i like and i don't know how to tell her that, i have a feeling she knows but if she doesn't i don't want to make a fool out of myself how is one way to boost my confidence on asking her out

How many moles of sulfur dioxide are produced when 4.38 moles of oxygen completely react with iron (iv) sulfide

When water dissolves sugar, which process is not involved? o dissociation o hydration o surface area of the solute increases sa