Suppose you want to make 2000g of a solution of glucose in water that has 2.8% (m/m) concentration. How much glucose should you use?

56 g of glucose

Explanation:

We can find the mass of glucose used as follows:

  (1)

Where:

is the solute's mass =?    

is the solution's mass = 2000 g  

% (m/m)= 2.8 %

By solving equation (1) for we have:

Therefore, you used 56 g of glucose to make 2000 g of a solution of glucose in water.

I hope it helps you!