Scientific Measurement
For the 1987 Copyright of The Addison Wesley Textbook
own words, explain what is meant by this statement.
2) What is the difference between an SI base unit and a derived unit? Give some examples
of each type of unit.
3) Two students massed the same sample sample on two different balances. The results
were as follows:
Balance A - 12.11 g and 12.09 g
Balance B - 12.1324 g and 12.1322 g
Which balance is more precise? If the mass sample is actually 12.1 g, which is more
accurate?
4) Convert the follwing Celsius temperatures to the Kelvin scale:
a. 37.0 degrees C b. 163 degrees C c. -62 degrees C d. 25 degrees C
5) Convert the following Kelvin temperatures to teh Celcius scale:
a. 255 K b. 25 K c. 300. K d. 273 K
6) Perform the following calculation. Then round off the result to the correct number of
significant digits:
19.7 cm x 20 cm =
7) Perform the following calculation. Then round off the result to the correct number of
significant digits:
18.1 m + 1012 m + 0.772 m + 0.01 m =
8) In the laboratory, liquids are oftern more easily measured by volume than by mass. If
a certain experiment calls for 12 g of bromine, a red fuming liquid, what volume of
bromine should you measure? The density of bromine is 3.1023 g / mL.
9) A 10.00 mL flask has a mass of 27.3114g. When this flask is filled with cooking oil, the
total mass is 37.1251 g . What is teh density of teh cooking oil in grams per mL?
10) How many significant digits are in the following measurements? Write them in
scientific notation.
a. 0.000340 mL b. 230 kg c. 45.9001 g d. 1000 L e. 300.2 g
11) Complete the following table of metric units:
Type of measurement Metric Unit Symbol
a. ________________ millimeter _______
b. ________________ microliter _______
c. ________________ ________ ng
d. ________________ ________ kPa
e. ________________ megahertz _______
f. ________________ cubic centimeter _______
g. ________________ _________ mA
h. ________________ picomole _______
