Answer:
When iron rusts - in the presence of moisture and oxygen - iron-oxide is formed. Iron oxide is nothing but a compound of iron and oxygen. There is an increase in the mass of the iron equal to the mass of oxygen that has gone into forming the rust.
<em>hope it helps:)</em>
They only conduct when they are in solution form, because then their ions become mobile, and the ions conduct electricity.
Hope this helps!
C, N and O all belong to the same period, in which it's 2nd Period.
It's on your exam boards specification or just google it. the foundation paper will have the same equations as higher, but higher just has more.
25x15 is 375 cndnmekcivjfndn(sorry it said I needed 20 characters to comment)
