The scientific method in chemistry is a systematic approach to exploring chemical questions and phenomena. It involves making observations, forming hypotheses, conducting experiments, and analyzing results to draw conclusions. This process helps chemists develop reliable, evidence-based knowledge a...
Coulombs Law - The force between charged particles can be used What is measured , → Unit of measurement → Symbol
to explain the properties of matter down -109 subatomic level
Length → meter → m
Scientific Method -
Kilogram Kg
" → →
Use of
carefully controlled experiments -10 answer scientific questions ? MASS
1. Question ?
2. collect information '
/ Data temperature → Kelvin →
K
3. Hypothesis
4. Perform Experiments
5. Pattern / constant relationship ? TIME → Second →
g
Qualitative Data -
amount of substance
→ mole → MOI
" "
Consisting of descriptive observations .
Metric system -
Quantitative Data -
Preferred system of units
" used in scientific work .
"
" "
Consisting of numbers obtained by measurement .
51 Units -
''
in terms of just one set of metric units
express all measurements
" .
Hypothesis
. .-
-
Volume -
amount of space occupied by
a substance
An idea or theory that is not proven
but that leads -10 further
study or discussion
unit of volume, one cubic declmetre ( 0.001 cubic metre)
liter
-
-
Law of nature or scientific law theory -
"
After many experiments , a pattern may emerge in the form of a constant relationship among millimeter -
mill molar; IMM -
_ 10-3114--10-314=10 3m01 / L -
"
Phenomena under the same conditions .
volume ofacube that measures lcmxlcmxlcm
cubic centimeter
-
Theory -
unit of mass
kilogram Kg; basic
" -
explains the law based on the experimental observations
unifying principle that
" .
. . _
a ,
Quantitative Measurement - grams
-
g ; basic unit of mass
"
of matter within a sample
"
Measurements in which the result is expressed as a number .
mass -
property that reflects the quantity
absolute temperature scale ; zero at absolute
Qualitative Observation Kelvin temperature scale
- zero
-
"
chemical
Note general characteristics , such as color, odor > taste, and the tendency to undergo scale -51 temperature scale
change in the presence of other substances .
"
Celsius temperature
Law of Conservation of mass
-
Density -
massofaunit volume ofamaterial substance
;d=rg
equal -10 the total mass of the
"
In a chemical reaction > the total mass of the reacting substances is
"
conserved chemical reactions
Products formed In other words
.
. . _
mass is in
.
Scientific Notation -
"
of 10
The expression Ofa number multiplied by the power
" .
Prefix →
Symbol →
Multiple → Example
g. Iga
-
→ f- → 109 or 1000000000 → / gigajoule ,
/ GJ -1×10-
"
Joules
→ M → 106 or 1000000 → /
megajoules 1145=1×106 Joules
mega
- ,
14110 - → K → 103 or 1000 → / Kilometer , 1km =/ ✗ 103 meters
Zor → / Centimeter / cm -1×10-2
"
1100
-
meters
→ 10
-
cent, -
→ C ,
10-3 Or 1/1000 → / millimeter , / mL -1×10-3 Liters
→
-
a /⑤
Atto → latta-soule.la-0=1×10-18 Joules
→
1/1000000000000000000
-
-
→ 10 op
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