What number would you write before water in the formula for calcium carbonate nonahydrate?
4
5
7
9

Question

What number would you write before water in the formula for calcium carbonate nonahydrate? 
4
5
7
9

anonymous · Answer

this is an algebra room not science

anonymous · Answer

opss does anyone know the answer thou?

anonymous · Answer

i dont thats for sure...sorry

anonymous · Answer

Calcium carbonate nonahydrate is a hydrous compound of calcium carbonate $CaCO_3$ and water $H_2O$. The number of $H_2O$ molecules is denoted by a Greek prefix in the name of the hydrate; nona- means nine. This means we can write our compound as $CaCO_3\cdot 9H_2O$. http://en.wikipedia.org/wiki/Hydrate#Inorganic_chemistry