Rank the solutions from least to most concentrated
solution a: 4.50 g solute in 400 mL solution
solution b: 4.50 g solute in 800mL solution
solution c: 2.25 g solute in 800 mL solution

C < B < A

Explanation:

The concentration of each solution can be calculated using the formula:

where

m is the mass of the solute

V is the volume of the solution

For solution A:

m = 4.50 g

V = 400 mL

So the concentration is

For solution B:

m = 4.50 g

V = 800 mL

So the concentration is

For solution C:

m = 2.25 g

V = 800 mL

So the concentration is

We see that

So the order from least to most concentrated is:

C < B < A