Posted by **Bryan** on Sunday, January 7, 2007 at 2:27pm.

I see the formula Al(OH)3.

Why are parentheses used in writing this formula?

The formula Na2O means we have two atoms of Na and one atom of O.

The formula Al(OH)3 means we have one atom of Al and three atoms of O and three atoms of H. Or, in other words, the subscript multiplies everyting INSIDE the parentheses.

Ba(NO3)2 means we have one Ba and two nitrate ions OR 2 Ns and 6 Os.

## Answer This Question

## Related Questions

- chemistry - Determine the number of moles of each specified atom or ion in the ...
- chemistry need help - Determine the number of moles of each specified atom or ...
- Chemistry - 23. Ductility is the ability to be hammered into sheets.- F? 25. A ...
- chemistry - How do I find the empirical formula for aluminium selenide? You have...
- a formula for excel - I have a formula but I can see to get it. shirt 13 at 29....
- Chemistry - the formula H2O2 is an example of 1.molecular formula 2. an ...
- Chemistry - The general formula for moment of inertia is: I = Sigma mi * ri^2 (...
- Geometry - What formula should be used to derive the equation of a parabola ...
- Chemistry - In our text book, the formula for finding the formal charge of an ...
- Math - Mathematicians have been searching for a formula that yields prime ...

More Related Questions