BPD: Pre Lab Questions

1. How many significant figures in each of the following numerical results:

a) 52.3 mL

b) 0.00360 g

c) 3.60 x 10^-3 g

2. A student needs 35.0 g of ethanol for an experiment. If the density of the alcohol is 0.789 g/mL, how many milliliters of ethanol are needed? Show your work. (Report your answer to the correct number of significant figures and with the correct units)

3. A student completed this lab and reported a value of 0.998 g/ml for the density of water. Report this value in g/L and mg/mL (report your answers in significant notation)

4. a) Is the density of water an exact number?

b) Is the number of people present in your lab today an exact number?