Answer:
Cobalt chloride
Explanation:
It is a molecule formed of one Cobalt atom, and two Chlorine atoms.
You can't really describe it but this is what it looks like http://www.chemspider.com/Chemical-Structure.453291.html
Carbonic acid is produced when a strong acid reacts with the bicarbonate buffer system in the human body.
Any given experiment has numerous control variables, and it's important for a scientist to try to hold all variables constant except for the independent variable. If a control variable changes during an experiment, it may invalidate the correlation between the dependent and independent variables.
It’s copied and pasted from google so make sure to put it in your words :)