# What mass of #Cr(NO_3)_3*9H_2O# is required to make a #100*mL# volume of a solution that is #2.00xx10^-3*mol*L^-1# with respect to #Cr^(3+)#?

##### 1 Answer

May 28, 2017

#### Answer:

We need a mass of approx...

#### Explanation:

We use the relationship,

and thus to get the

And this represents a mass of...............

Note that this question has been poorly specified. When you say