A)  How many significant figures are given in the following:

1) 2.2 5) 1960 9)2200

2) 196 6) 0.0196 10) 2.20 x 10-3

3) 2.02 7) 2.200 11) 125000

4) 0.020 8) 107.880 12) 190

B)  Perform the indicated operations retaining the correct number of significant figures in the answer

1) a) 263 + 0.0742 + 7.7 = b) 0.00625 + 0.072 + 0.928=

c) 0.318 + 23.0494 + 12.22= d) 0.62 +19800 + 10.44=

2) a) 9.4626 – 9.3901= b) 16.2105 – 12.7=

c) 0.0692 – 0.051= d) 48 – 0.064=

3) a) 4.98 x 0.03= b) 198 x 1.2=

c) 97.6 x 0.1141= d) 2.2 x 0.0343=

e) 1.0080 x 0.143= f) 210 x 0.1535=

4) a) 63.41/0.31= b) 939/136.2=

c) 0.042/1.0080= d) 4200/107.880=

5) a) 0.2 x (760/743)x(303/273)= b) (259700x300x0.0105)/(0.621x 19.57)=

c) (22.414 x 0.894)/0.082=

The Metric System

Prefix / Power / Symbol / Linear / Volume / Mass
tera / 1012 / T / Terameter (Tm) / Teraliter (TL) / Teragram (Tg)
giga / 109 / G / Gigameter (Gm) / Gigaliter (GL) / Gigagram (Gg)
mega / 106 / M / Megameter (Mm) / Megaliter (ML) / *megagram (Mg)
kilo / 103 / K / Kilometer (km) / Kiloliter (kL) / Kilogram (kg)
hecto / 102 / H / Hectometer (hm) / Hectoliter (hL) / Hectogram (hg)
deca / 101 / Da / Decameter (dam) / Decaliter (daL) / Decogram (dag)
100 / Meter (m) / Liter (L) / Gram (g)
deci / 10-1 / D / Decimeter (dm) / Deciliter (dL) / Decigram (dg)
canti / 10-2 / C / Centimeter (cm) / Centiliter (cL) / Centigram (cg)
milli / 10-3 / M / Millimeter (mm) / Milliliter (mL) / Milligram (mg)
micro / 10-6 / m / Micrometer (mm) / Microliter (mL) / Microgram (mg)
10-10 / Å / ** Ångstrom (Å)
Nano / 10-9 / M / Nanometer (nm) / Nanoliter (nL) / Nanogram (ng)
pico / 10-12 / P / Picometer (pm) / Picoliter (pL) / Picogram (pg)
Famto / 10-15 / F / Fantometer (fm) / Fantoliter (fL) / Fantogram (fg)
atto / 10-18 / a / Attometer (am) / Attoliter (aL) / Attogram (ag)

* 1 megagram = 1,000 kilograms = 1 metric ton

** The Ångstrom unit is not part of the metric system but is used frequently in chemistry.

1.  Write four steps of the scientific process:

2.  Fill in the chart

Quantity / Symbol / Unit Name / Unit Abbreviation
Length
t
Mole
A

3.  What Quantity is defined by:

a)  length x width

b)  mass / amount of substance

c)  force x length

4.  Convert the following to the indicated significant figure

a)  28.145 (3 sig-figs)

b)  .00459 (2 sig-figs)

5.  Solve the following equations. Be sure to account for sig-figs

a)  24.1 + 2.45

b)  3.05/2.01

c)  3.1 + .000000000001

6.  Write the following numbers in scientific notation

a)  2013.21

b)  .00157

c)  1.59

7.  Draw a direct and inverse graph.

9/3/2009 Sig Fig W/S