Practice problems

 

Determine the molecular weight of C6H12O6 (glucose).

Element

Atomic Weight

Number of atoms

Weight (g)

Carbon

12

6

72

Hydrogen

1

12

12

Oxygen

6

6

96

Molecular weight

(sum of the atomic weights)

180

180 grams of glucose = 1 mole

How would you prepare 1 liter of a 1M (molar) solution of glucose (C6H12O6)? a 0.25M solution?

what about a 0.25M solution?

How would you prepare 250 ml of 0.3 M solution of NaCl?