Question

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

Answer 1

this is an algebra room not science

Answer 2

opss does anyone know the answer thou?

Answer 3

i dont thats for sure...sorry

Answer 4

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