Question

Which of these is a example of a chemical change?

A. Boiling Water
B. Cooking Hamburger

Answer 1

I think it is the hamburger am I right?

P.S. I stink at Biology

Answer 2

A chemical change is when the substance is changed into a different substance. Example, a paper gets burned, the substance is no longer a paper, it becomes ashes.

Now, any ideas?

Answer 3

When a chemical change occurs it can't be converted back

Answer 4

Well the boiling water turns into steam so it is that. Because isn't it a physical change for that hamburger because it does not change the chemical attributes?

Answer 5

Water turns to steam, is a change in matter from liquid to gas. The physical state or form is changed, can gas be converted back to liquid? Yes or no.

Answer 6

Yes it can be converted back by lowering the temperature plus water vapor is still H20, that means nothing was changed. If the compound of water is changed then it is no longer H20 which then it can be considered a chemical change.

Answer 7

Ok

Answer 8

Sorry i was helping someone with math I am back now

Answer 9

That leaves us with Cooking Hamburger. Can you turn the meat back to raw?

Answer 10

No you can't

Answer 11

Does that mean it's a physical or chemical change?

Answer 12

you have to get new hamburg and that means chemical because it can't be changed back

Answer 13

Yes. :)

Answer 14

Ok thanks!

Answer 15

yw ^_^

Answer 16

Can you help me with another one?

Answer 17

What is the chemical formula for a molecule containing six hydrogens, three oxygens and four carbons

Answer 18

Here is what I came up with C4H6O3?

Answer 19

That is what you got too does it matter what order it is in?

Answer 20

Yes, what you wrote was coorect. Acetic anhydride