1 nm = 10-9 m

1 mm = 10-3 m

1 cm = 10-2 m

1 dm = 10-1 m

1 km = 103 m

1 ft = 12 in

1 mile = 5280 ft

1 in = 2.54 cm

1 yard = 3 feet

1 week = 7 days

1 min = 60 sec

1 hour = 60 mins

1 day = 24 hours

1 atm = 760 mm Hg

1 cal = 4.184 J

1 mL = 1 cm3

1 mol = 6.022 x 1023 atoms

For the metric to metric conversion factors the underlined part can be replaced with any SI base unit.

Show all work. Use proper dimensional analysis. Watch significant figures and units on all numbers.

1. How many nanometers are there in 25.0 millimeters?

2. How many centigrams are there in 1250 kilograms?

3. How many miles are there in 2355 meters?

4. How many seconds are there in 0.00455 weeks?

5. A medication tablet has a mass of about 355 mg. What is the total mass of tablets in a 725-tablet bottle in grams?

6. The pressure was recorded as 785 mm Hg. What would that pressure be in atmospheres (atm)?

7. 125000 Joules (J) are used to heat a cup of water to make tea. What is the quantity of heat in kilocalories (kcal)?

8. How many atoms are there in 2.5 moles (mol) of helium atoms?

9. If the volume was measured to be 1850 mL, what would the volume be in cubic feet (ft3)?

10. What volume in milliliters would 1.250 grams of air occupy if the density is 1.08 g/L?