It is simply not accurate due to many reasons such as environment, user, instrument as well as light which can easily change colours
There you go. I gave you a image.
Answer:
CaCO3: 1 calcium 1 carbon 3 oxygen
CaO: 1 calcium 1 oxygen
CO2: 1 carbon 2 oxygen
Answer: You need approximately 70 g of potassium carbonate.
Explanation:
Hope this helps :) Good Luck!