Chemistry
Name:________________________
2.2 Numerical Problem Solving
Date: __________________
SI units/Metric
2. Complete the table:
Quantity
Unit
Unit Symbol
Electric current
meter
s
Mass
Kelvin
Amount of substance
Luminous Intensity
cd
3. List the units from largest to smallest: meter, millimeter, kilometer, centimeter, picometer.
____________________________________________________________________
Match each quantity to be measured with the most appropriate SI unit.
a.
centimeter
b. gram
c.
Kelvin
d. kilogram
e.
meter
f.
newton
g.
second
___4. length of swimming pool
___ 5. length of a pencil
___ 6. mass of a pencil
___ 7. mass of a bag of apples
___ 8. time between two heartbeats
___ 9. temperature of boiling water
___10. weight of a textbook
Copyright ©by the Glencoe Division of Macmillan/McGraw-hill School Publishing company.
SIGNIFICANT FIGURES
11. For each group of digits indicated in the three numbers below, state whether the digits are
significant. State the rule that applies.
4500.60
0.000799
220
a. ______________________________________________________________________
b. _____________________________________________________________________
c. ______________________________________________________________________
d. _____________________________________________________________________
e. ______________________________________________________________________
f. ______________________________________________________________________
12. A stack of books contains 10 books, each of which is determined, by a ruler graduated in
centimeters, to be 25.0 cm long. How do these two quantities differ in terms of significant digits?
_______________________________________________________________________
______________________________________________________________________
Percent Error
13. What is the percent error in a determination that yields a value of 8.38 g/cm 3 as the density of
copper? The literature value for this quantity is 8.92 g/cm3.
14. Yusuf measures the melting point of ammonium acetate, NH 4C2H3O2, as 117 ˚C, but the
literature value is 114 ˚C. What is the percent error in the measurement?
Copyright ©by the Glencoe Division of Macmillan/McGraw-hill School Publishing company.
Copyright ©by the Glencoe Division of Macmillan/McGraw-hill School Publishing company.