Question

8.5 g of rubidium are reacted completely with water.

The reaction makes a solution of rubidium hydroxide.
The volume of this solution is 2.5 dm'.
Calculate the concentration of the rubidium hydroxide solution in g dm
(relative atomic mass: Rb = 85; relative formula mass: RbOH = 102)​


please how do i work this out ​

Answer 1

3.4g/dm³

Step-by-step explanation:

Mass concentration = mass of solute/volume of solution

According to this question;

Mass of rubidium = 8.5g

Volume of rubidium hydroxide solution = 2.5dm³

Mass conc. = 8.5/2.5

Mass conc. 3.4g/dm³.