Dimensional Analysis
(FactorLabel Method)

Practice Problems
Level 2 Answers

Use dimensional analysis
in solving each of the following problems.

1. Convert 15.9
mm to its equivalent in km.

2. Convert 0.0982
hg to its equivalent in cg.

3. Convert 13,455
g to its equivalent in kg.

4. Convert a
speed of 73.5 km/hr to its equivalent in m/s.

5. Convert a
density of 4.52 g/mL to its equivalent in kg/L.

6. The
density of iron is 7.86 g/mL. What volume of iron will have a mass
of 50.00 g?

7. The
density of helium gas is 0.178 g/L. What would be the mass of 375.0
mL of this gas?

8. A particle
moving through a gas at a speed of 45.8 m/s strikes one wall of the container,
bounces off and hits the other wall 25.0 cm away. How long did it
take to go from one wall to the other?

9. A mole of
sodium atoms contains 6.02 X 10^{23} atoms. How many moles would
be needed in order to have 25.0 X 10^{23} atoms?

10. A mole of hydrogen
atoms contains 6.02 X 10^{23} atoms. A section of outer space
contains 25 atoms. How many moles of hydrogen is this?

11. The speed of light
is 3.0 X 10^{10} cm/sec. Express this speed in km/hr?

12. A sample of seawater
contains 6.277 g of sodium chloride per litre of solution. How many
mg of sodium chloride would be contained in 15.0 mL of this solution?
