Question

What is the mass (g) of 0.95 mol of the element bromine (Br)?

Answer 1

`"1 mole of bromine atoms"` has a mass of `79.9*g`.

Explanation:

Of course, we normally encounter bromine as the bromine molecule, `Br_2`.

As to your question, the mass is simply the product of moles and atomic mass: `0.95*cancel(mol)xx159.8*g*cancel(mol^-1)` `~=` `150*g`

Bromine is one of the few elements that is a liquid under normal conditions. There are few things in a laboratory that are as dangerous and corrosive as neat bromine. If you have to use it, you should treat it with some respect.