Question

How many grams of glucose, C6H12O6, do you need to make a 50 mL solution that has a concentration of 2.0 M?

PLEASE HELP ASAP!!!!!!

Answer 1

18.0g of glucose are needed

Step-by-step explanation:

Molarity, M, is an unit of concentration widely used in chemistry. Is defined as the ratio between moles of solute (In this case, glucose) and liters of solution (50mL = 0.050L).

To solve this question we must find the moles of glucose that we need to prepare the solution. Then, using the molar mass of glucose (180.156g/mol) we can find the mass that we need:

Moles Glucose:

0.050L * (2.0mol / L) = 0.100 moles Glucose

Mass glucose:

0.100moles Glucose * (180.156g / mol) = 18.0g of glucose are needed