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.
density of iron is 7.86 g/mL. What volume of iron will have a mass
of 50.00 g?
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 1023 atoms. How many moles would
be needed in order to have 25.0 X 1023 atoms?
|10. A mole of hydrogen
atoms contains 6.02 X 1023 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 1010 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?