Question 1
An aqueous solution containing 1.0 g ephedrine in 20.0 mL solution is said to be:
◦ 5.0% ephedrine (mass/vol)
◦ 1.0% ephedrine (mass/vol)
◦ 0.50% ephedrine (mass/vol)
◦ 0.050% ephedrine (mass/vol)
◦ 20.0% ephedrine (mass/vol)
Question 2
An aqueous solution containing 12.0% MgCl
2 by mass. What is the mol fraction of water in this solution?
◦ 0.975
◦ 0.880
◦ 0.868
◦ 0.133
◦ 0.952