The answer will be Experimental investigations involve a process in which a "fair test" is designed and variables are actively manipulated, controlled, and measured in an effort to gather evidence to support or refute a causal relationship. Experimental investigations have a control group which does not receive any treatment.
Answer:
One mole of calcium is present in one mole of calcium carbonate
Explanation:
Because its formula is CaCO3
Ca contains 2+ charge and CO3 contains 2- charge
It is totally b all because of the state's in the reaction which would stop the reaction from occurring in a natural state.