A sample of glucose, C6H12O6, contains 4.5 x 1018 carbon atoms. If the sample has a total volume of 745 mL, what is the molarity of the glucose sample?

Question

moles problem

Answer 1

I will explain how to solve this, but YOU do the calculations.  You need to find how many moles of glucose you have, and divide that by the volume in liters (0.745 L) to get molarity in moles per liter.

 

(1)  There are 6 atoms of C in each molecule of glucose, so divide the given number of C atoms by 6.  That gives you the number of glucose molecules.

 

(2)  Divide the number of glucose molecules by Avogadro's number (≅ 6.02 x 10²³).  That gives you the number of moles of glucose.

 

(3)  Divide the number of moles of glucose by 0.745 L.  That gives you the concentration of glucose in moles per liter.

 

You can finish from here.