I think it is B because you didn’t type the options
Answer:
light with a high enough intensity
Explanation:
Answer: Heating the hydrated forms of cobalt chloride reverses the reactions above, returning cobalt chloride to the blue, water-free, or anhydrous, state. Water is "liberated" in these reactions, known as dehydration reactions.
Explanation:
Answer:
hydrogen and oxygen to form water
They are too small to see with the naked eye