Susan needs to measure and heat the chemical she wants to use in an experiment with a graduated cylinder. which graduated cylinder is suitable for use?

a) plastic cylinder
b) glass cylinder
c) metal cylinder

I think the best answer from the choices listed above is option B. The best graduated cylinder for this case is the glass cylinder. A metal cylinder is not possible because you cannot measure really since metals are not transparent. A plastic cylinder cannot also be used since the substance should be heated for the experiment.

30litre of li2o is 1.0002mole approximately 1 mole

True, the standard unit for volume is liters which can be represented by either a lower case "l" or a capital "l"