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CHEMISTRY FOR ENGINEERS
Learning Module 1
MEASUREMENT AND THE SCIENTIFIC PROCESSES

Pre-test:
1
...

In my own understanding, chemistry is the study of matter, substance,
elements, chemicals and how they related or combine with each other
...
Chemistry also involves laboratory experiments using test
tube and chemicals to understand their chemical reaction
...
Cite some examples where chemistry is applied and importance of chemistry in our
daily lives
...
The importance of chemistry can’t be
measured
...
Chemistry studies everything and
can teach us many life skills
...
Define the following:
3
...
Physical vs Chemical
Physical talks about the appearance or the physical properties while
chemical talks about chemical properties
...
Chemical change is the change of a substance into a
new substance with a new chemical formula
...
2
...
Intensive properties do not depend on the amount of matter so it is
independent (melting point, boiling point, density, etc
...
)
3
...
Accuracy vs Precision
Accuracy and Precision are used by scientist to find an error
...

3
...
Scientific Notations vs Significant Figures
Scientific Notations and Significant Figures are both number based
...
7
...
Significant figures are the number of digits in a value
...

3
...
S
...
units and Dimensional Analysis (conversion)
International system of units is the most widely used system of units
...
The unit is converted to one
another and this process is called dimensional analysis
...
6 Density and Specific Gravity
Density and specific gravity are measurement that describes mass
...

3
...
Temperature

It is the measurement of the hotness or coldness of either a body or a
substance or object of even a person
...
What are the Scientific Method and its importance?
Scientific methods are methods used to achieve a desired result
...
Using the scientific
method helps the researcher keep away from biased opinions
...


Self-Evaluation:
ESSAY: Read the question and answer it using the facebook status format
below
...

Understanding, familiarity, and awareness of the things
around us give us benefits and learning about how
things do its magic and its mystery
...
Chemistry they say is everything you do and
I beg to agree
...
From the food we ate, medicine we take, clothes we
wear, soaps we use, fuels for transportation, and even
our body, we are made up of biochemical like
carbohydrates, protein, lipids, etc
...
Same goes with the importance
of measurements and application of scientific method
...
Not only measurement is important in
science, we can also use it every day though it is often
taken for granted
...
But not only it is
helpful to scientists
...
With thorough investigation, we will be able
to produce facts and answer questions in logical
manner
...


Review of Concepts:

Using the concept of scientific method, create your own original poem or song
...


Identifying the problem

Formulate hypothesis

Analysis of data

Conclusion

Experimentation

Recommendation

Let’s do a research
To answer our curiosity
Conducting deeper study
By making systematic inquiry

Identifying the problem is the first we do
Look for the issues and concepts worth to study too
Formulate the hypothesis through gathered information
So we can proceed to experimentation

Let’s not forget data analysis
To organize the data process
And finally get the conclusion
Which overview future possible research or call for action

After conclusions comes the recommendation
That provides suggestions on course of action
And see if it answers all the questions
So we can start the preparation of publication
...
Encircle the letter of your best answer
...
These are examples of chemical properties except
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explosive
b
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viscosity
d
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The volume of a liquid is 20 ml
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3 ml, 18
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6 ml
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good accuracy and poor precision
b
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both accuracy and precision are good
d
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A property of a substance that depend on the amount of mother present
a
...
chemical

c
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extensive

4
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Which of them is not?
a
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any zeros after non-zeros in a number with decimal point
c
...
any zeros before non-zeros are not sig-figs
5
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314 + 5
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7
...
7
...
7
...
6

6
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in rounding off significant figures, round off to the nearest number of sig-figs when
multiplied
...
in scientific notation , when the decimal point is shifted to the left, the exponent
value decreases
...
in significant figure rules, any zeros after non-zeros in a number without decimal
point are not sig-figs
d
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Multiply the following scientific notation: (2
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58x〖10〗^4)
a
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59 x 107
b
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59 x 104

c
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59 x 10
d
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59 x 103

8
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1 ml of a liquid has a density of 1
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What is the liquid’s weight (in mg)?
a
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180 mg

9
...
It is denoted in Celsius scale
as?
a
...
-459
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-273
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none of the above

10
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5 kilometers to millimeters, where 1 km= 1,000,000 mm
a
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45,000 mm

c
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4,500,000 mm

II
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Scientific Notation and Significant Numbers
1
...
10459000

= 1
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340900

= 3
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0
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789 x 10-2

d
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0089754

= 8
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6701924

= 6
...
0
...
857 x 10-5

2
...
3
...
6
...
006081

c
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234 x 10-2

= 0
...
6
...
0006094

e
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91 x 103

= 4,910

f
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567 x 107

= 45,670,000

3
...
259
...
3
...
0
...
1
...
5000 J

=1

f
...
3
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5 x 103 g

=1

i
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00291 m3

=3

j
...
01020 kg

=4



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