I think it’s C since the ice changes from solid to a liquid which is physical and then it reacts with calcium metal making the calcium hydroxide which is chemical change. And another sign of it being chemical was the release of gas.
The answer is D wave 2 has more energy because it has a high frequency than wave one
Explanation:
Iron atom is been oxidised as it losses 2 electron to form 2 + ion.
Answer:
two may be the answer (2)
