# #"Solute 1"#, #"S1"#, has a molecular mass of #40.0*g*mol^-1#...what is...?

##
...what is #[S1]# if a #4*g# mass of this material is dissolved in a #200*mL# volume of solution?

...what is

##### 1 Answer

Aug 29, 2017

By definition,

#### Explanation:

And typically, we use

And thus

And note the dimensionality of this solution....

We cancel out common terms in the numerator and denominator....

Why? Because