Hey there! :D
Which of the following is a chemical change?
A <em>chemical change </em>is a change that alters the makeup of a substance or something. It changes what it is made of. You cannot alter chemical changes.
Boiling water can go back to regular room temperature water. This is not a chemical change.
Melting a cube of ice is not a chemical change. We can freeze the water again to make it ice.
Dissolving 10 grams of salt in water is not a chemical change. You can boil the water and split the salt and water. People do this with Ocean water, to make it drinkable.
Splitting water into hydrogen and oxygen is a chemical change. You change the makeup of the water. It is now separate hydrogen and oxygen. It is not water anymore. "D" is the answer.
I hope this helps!
~kaikers
Answer:
Gas forming is a clue to chemical change.
Explanation:
It's changing the chemical make up of the item at hand
First you need to know Avogadro constant and then divide it with mile 9f silicon.
then you got answer
mark as brainliest please
Answer: the correct answer is 100% B. scandium‚ Sc‚ atom contains 45 electrons outside the nucleus and 21 neutrons inside the nucleus. just took the test and got it right
