The correct answer is C.
Burning is a chemical change. It's a chemical process that includes oxygen.
All the other options are a change of state: form solid to liquid, or from liquid to gas (as in the last one).
Answer:
C
Explanation:
KCl - the flame test for Potassium produces a lilac flame
6.4 * 6.02 * 10^23 = 3.8528*10^24 atoms
Don't let the fact that it's vanadium throw you off, avagadros constant stays the same for all elements
Organelles are called chloroplasts
As the metal rusts it expands increasing its mass therefore increasing the weight.