Which is a chemical change? a. water boiling b. wood burning c. glass breaking d. ice melting e. molding iron

A chemical change alters the chemical makeup of a substance. So, wood burning would be a chemical change. The others just alter the physical makeup of the substance.

The answer would be "wood burning" or option B. Chemical change is when a element get's turned into another element. Many people mistaken chemical change, and physical change but psychical change would be this: if you cut a piece of wood in half that would be a physical change because it's still wood but it's smaller. But if you burn wood into ash it would be a chemical change that's because it's no longer wood it's ash.

Also, it wouldn't be option A because that's still water but in gas for which is water vapor which is a physical change. It's also not option C because glass being broken is also a physical change it's still glass but it's smaller. It's also not option D because it's also a physical change, it's still water but in a different form. It wouldn't be option E because it's a physical change it's being molded into liquid iron which means it's still iron but in a different form. Basically all of the other options are examples of a physical change.

Hope this helps!

the correct option is c.

isotopes refers to different forms of the same element with the same atomic number but different mass number as a result of difference in their neutron numbers. isotopes have different relative atomic mass but share the same chemical properties.

answer:

the reaction is type of combination reaction.

explanation:

on the product side, there are 2 molecules of bonded to fe   which means one atom of fe are combined two molecules of . so, balanced chemical equation becomes :

this reaction follows the reaction type of combination reaction. a combination reaction is defined as chemical reaction in which reactants combines together to form a single product.