# Metric Sample Problems ```Measurement Unit Sample Problems
Name: ___________________________________
Manometers
1. Record the pressure indicated by each of the following instruments. You may assume that the atmospheric
pressure is 778 mm Hg for A-E. Find ATMOSPHERIC PRESSURE for F!
970mm
1500mm
900mm
600mm
210mm
A.
B.
195 mm
200mm
60mm
C.
D.
580m
m
120mm
195mm
70mm
15mm
E.
405 mm
F.
0mm
30mm
0mm
2. An open manometer is filled with mercury. The mercury level is 12mm higher on the side open to the atmosphere.
What is the total pressure of the gas, in kPa, if the atmospheric pressure is 100.8 kPa?
3. An open manometer is filled with mercury and connected to a container of hydrogen gas. The mercury level is 57mm
higher in the arm of the tube connected to the hydrogen. If the atmospheric pressure is 748.6 mm Hg, what is the
pressure of the hydrogen gas?
4. A closed manometer is filled with mercury and attached to a container of helium. The difference in height of mercury
between the two arms is 521 mm. What is the pressure of the helium?
Dimensional Analysis
5. 450 000 mm = ? hm
6. 2.3 x 10-8 kL = ? &micro;L
7. 3.6 x 104 s = ? days
8. 36 mm3 = ? cm3
9. A room measures 144 in by 180. in. Calculate the number of square yards of carpet needed to cover this area.
10. A motorcycle is clocked at 30.6 m/s. Will the driver get a ticket if the speed limit is 55 mph?
Density
11. What is the density (in kg/L) of a rock if its mass is 36 g and its volume is 12 cm3?
12. If a block of wood has a density of 0.60 g/mL and a mass of 120. g, what is its volume?
13. A sample of aluminum has a volume of 45.0 mL. Calculate the mass if aluminum has a density of 2.70 g/mL.
Specific Heat
14. It takes 487.5 J to heat 25 grams of copper from 25 &deg;C to 75 &deg;C. What is the specific heat of copper?
15. How much energy is required to heat 120.0 g of water from 2.0 &deg;C to 24.0 &deg;C?
16. Sidney is home from school with a cold, so mom has made him a bowl of chicken soup (c=4187J/kg&deg;C) which she
ladles from a pot into a glass bowl. If 0.60 kg of soup at 90.&deg;C is placed in a 0.20 kg glass bowl (c=840J/kg&deg;C) that is
initially at 20.&deg;C, what will be the temperature of the soup when the soup and the bowl have reached equilibrium?
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