Chemistry 0130 Tutorial 2A practice questions (Winter 2015)

Topics for review:

Significant figuresUnit conversions

1. Complete the following calculations, giving your answer with the correct number of significant figures.

a. 85.27 + 32.8 =

b. (61.42 – 55.8) = 1380

c. 125.27 – 37.6 =

d. (60.72 + 45.624) = 1280.65

2. Carry out the following unit conversions, giving your answer in scientific notation:

a. 58000μg to kgb. 0.1860mm to nmc. 0.004960g to μgd. 2680000cm to km