10 seconds = 8grams
then just divide by 2 another 4 times...
= 0.5grams after 50 seconds
Because the formation of rust is a kind of chemistry reaction.
After chemistry reaction, compound with new properties is produced.
Of course, color is one of the new properties.
For example, if you put iron in colorless acid solution, a green solution is made.
This kind of chemisty reaction differs from physical reaction, for example, pigment with one color dissolves in liquid, a liquid with same color is made.
Answer:

Explanation:
Half time is period required to desintegrating the half of the initial number of atoms. Then, the total time is:


A variable that stays the same
Try warm water& soap if u haven’t already,if that doesn’t work try rubbing alcohol