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Lecture 2

CHEM 06100 Lecture Notes - Lecture 2: Scientific Notation

Chemical Engineering Biochemistry
Course Code
CHEM 06100

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1.3 Scientific Method
Observations- Pieces of quantitative information (Data)
Hypothesis-Proposal made to explain on observation
Experiment- A set of procedural steps that test a hypothesis, often leads to a revised
hypothesis and new experiments to test it. An experiment typically contains at least two
variables, quantities that can have more than one value
Model- Formulating theories based on experiments that test hypothesis about
observations distinguishing scientific thinking from speculations.
1.4 Measurement and Chemical Problem Solving
General features of the SI Units
The SI system has seven fundamental units or base units, each identifies with a physical
For quantities, much smaller or larger than the base unit, we use decimal prefixes and
exponential (scientific notation)
Volume- Any sample of matter that has a certain volume, the amount of space it
occupies. The SI unit of volume is the cubic meter (m3)
In Chemistry, we often use non-SI units, the liter (L) and the milliliter (mL).
Mass is a ostat eause a ojet’s uatity of atte aot hage.
Density- A combination of units as a conversion factor
In Chemistry, a very important example is density (d), the mass of an object divided by
its volume
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