A) Burning
Burning is a chemical reaction while the other three answers are physical reactions.
Answer:
ya, it's gravity. What is the problem??
Explanation:
Answer: The actual reaction to make water is a bit more complicated: 2H2 + O2 = 2H2O + Energy. In English, the equation says: To produce two molecules of water (H2O), two molecules of diatomic hydrogen (H2) must be combined with one molecule of diatomic oxygen (O2). Energy will be released in the process.
Explanation:
