1. Prefixes in the Metric System
Abbreviation
Meaning
Example
Giga G
109 (BILLION)
1 gigahertz
1 x 109 Hz
Mega M
106 (MILLION)
1 megaton
1 x 106 tons
Kilo k
103 (thousand)
1 kilogram (kg)
1 x 103 grams
Deci d
10-1 (tenth)
1 decimeter
1 x 10-1 m
Centi cm c
10-2
1 centimeter
1 x 10-2 meter
Nano n
10-9 (one billionth)
1 nanometer
1 x 10-9 meter
Pico p
10-12
1 x meter

2. Chemistry, Chapter 2, Continued
9.58 pm
The distance between an O atom and an H atom in a water molecule is What is the distance in nanometers?
We have to convert picometers to nanometers.
You have to convert picometers to meters to nanometers.
Unit Given x Unit Conversion = Answer
Given Unit
95. 8 x 1 x meter = x – 1 pm-
1 picometer
95. 8 x – 1 pm- = 95.8 x m

3. Example 1: Distance on the Molecular Scale
95.8 x m

4. Gibbs Free Energy Equation
The Gibbs Free Energy equation is given by the equation: ΔG = ΔH - TΔS Where: ΔG
= Gibbs Free Energy changeΔH
= Enthalpy changeT
= temperature ΔS
= Entropy change NOTE: Write Δ as delta for the answers below.
In order to solve for the temperature, T, you must: Step One... AddStep TwoMultiply byThe resulting equation is:T =