CHEMISTRY LABORATORY

Question 1

___ always have uncertainty

Answer 1

Measurement

Question 2

Rule no. 1 (For significant figures)

00 (34) 0.00 (321) 0

Answer 2

All non-zero numbers are significant

Question 3

Rule no. 2 (for significant figures)

00 (340).(00321) 0

Answer 3

Zeros between non-zero numbers are significant

Question 4

Rule no. 3 (for significant figures)

00 (340.00321) 0

Answer 4

Leading zeros are never significant

Question 5

Rule no. 4 (for significant figures)

00 (340.003210)

Answer 5

Zeros on the end of a number are significant only if there is a decimal point

Question 6

Q. How many significant figures
1. 00340.00 - Rule?
2. 800.1 - Rule?
3. 0800.10
4. 800
5. 800.

Answer 6

5 (Rules 1 and 4)
4 (Rules 1 and 2)
5 (Rules 1,2 and 4)
1 (Rules 1 and 4)
3 (Rules 1 and 4)

Question 7

A ___ is a collection of quantitative or numerical data that describes a property of an object or event. A measurement is made by comparing a quantity with a standard unit.

Answer 7

Measurement

Question 8

SI is a specific ___ system, which is a decimal system of measurement.
Comes from the french name ____, commonly used metric system.

Answer 8

Metric system
Système international d’Unités

Question 9

Common forms of the metric system
MKS and CGS

Answer 9

Meter
Kilograms
Seconds as base units
Centimeter
Grams
Seconds as base units

Question 10

This system is based on the foot-pound-second units, for units of length, mass and time

Answer 10

English system

Question 11

_____ are quantities that can be measured directly using measuring device

Answer 11

Fundamental quantities

Question 12

SEVEN BASIC (FUNDAMENTAL UNITS OF SI )
1. ___ (m) a basic property of matter. The standard unit is the ____ (kg).
• One (kg) is 1 ___ (L) of water at 4°C and a pressure of 1 atmosphere (atm).
• Object remains the same even if the position of the object is changed with reference to the Earth’s center.
• It is measured using the ___ or the ___ balance

Answer 12

Mass
Kilograms
Liter
Triple beam/ Equal arm

Question 13

SEVEN BASIC (FUNDAMENTAL UNITS OF SI )
2. ___ (L) is a distance between two distincts points. It is measured by using ____.
• ____ (w) is also a length, And ___(h) is the vertical distance.
• The basic unit is the ___ (m)

Answer 13

Length
Metric ruler
Width
Height
Meter

Question 14

SEVEN BASIC (FUNDAMENTAL UNITS OF SI )
3. ___ (t) is the regular interval between two successive points. The standard unit of time is the ___. The ___ was originally defined in terms of motion of the earth, but it was revised and instead compared to vibrations of cesium atoms.

Answer 14

Time
Seconds
Cesium atoms.

Question 15

SEVEN BASIC (FUNDAMENTAL UNITS OF SI )
4.____ is the measure of hotness or coldness of an object. It is technically defined as the measure of the average kinetic energy of a body.
• ____ (k) is used as the basic unit

5. ____ (I) is the measure of the flow of electrons or charges.
   • An ___ is used to measure current Expressed as ____ (A)

Answer 15

Temperature
Kelvin
Electric current
Ammeter
Ampere

Question 16

SEVEN BASIC (FUNDAMENTAL UNITS OF SI )
6. ___ (E) is the amount of illumination received by an object.
• The unit of measure used to describe this is ___ (cd)
7. ___ (n) is the number of moles.
• the basic units is the ___ or ___

Answer 16

Luminous intensity
Candela
Amount of substance
Mole
Mol

Question 17

COMMON METRIC UNITS ( LENGTH)
1 meter, m= _____ centimeters, cm
1 meter, m= _____ millimeters, mm
1 meter, m= _____ micrometer, uqm
1000 meters,m= ____ kilometers, km

Answer 17

100
1000
1000 000
1

Question 18

COMMON METRIC UNITS ( MASS)
1 kilograms, kg= ____ grams, g
1 gram, g= _____ milligrams, mg
1000 kilograms, kg= ____ metric ton

Answer 18

1 000
1000
1

Question 19

COMMON METRIC UNITS (Volume)
1 liter, L= ____ milliliters, mL
1 liter, L= ____ cubic centimeters, cc

(TEMPERATURE)
• °C = / (°F-___) or
°C= (°F-32)/ ___
• °F = __/__ (°C) +32 or
° F= __/__(°C) +32

Kelvin, K= °C+ ____

Answer 19

1000
1000
5/9
32
1.8
9/5
1.8
273

Question 20

METRIC- ENGLISH EQUIVALENT
Metric
1 Liter, L - ____ quarts,qt
250 milliliter, mL - ____ cup, c
1 kilograms, kg- _____ pounds, lb
28.3 grams, g - ____ ounce, oz
3.79 liters, L- _____ gallon, gal

Answer 20

1.06
1
2.2
1
1
1

Question 21

____ is a way of converting one unit to another

Answer 21

Dimensional analysis

Question 22

WHERE IT ALL BEGAN
1. “ Golden age of philosophy”
2. Age of atomism

Answer 22

600 B.C and 400 B.C
440 B.C and 420 B.C

Question 23

CHEMISTRY TODAY
3. Art of mining and purifying the metals, gold, silver and copper. They were making embalming fluids and dyes.

4. ” Philosophers stone” a supposed cure for all diseases, and the “Elixir of life” which would prolong life indefinitely

Answer 23

Khemia
Alkheima/ alchemy

Question 24

1. The forerunner of modern chemistry; formulated the law relating volume and pressure
2. The father of modern chemistry; theory of combustio

Answer 24

Robert boyle
Antoine lavosier

Question 25

_____ is a compact, simple and easy way of writing down very small and very large number using powers of ten. The ___ tells the number of times the decimal point is moved from its original place to the right or from the original place to the left. • The exponent is ____ if the decimal point is moved from left to right and ____ if it is mover from right to left.

Answer 25

Scientific notation Exponent Negative Positive

Question 26

____ is a degree between a measured value and the true value. (It means how close the measurements are to the true value.)

Answer 26

Accuracy

Question 27

____ is the degree of the instruments exactness (refers to the degree to which successive measurements agree with each other)

Answer 27

Precision

Question 28

___ are the numbers of digits or figures that best represents the value of a measurement.

Answer 28

Significant figures

Question 29

TIMELINE IN CHEMISTRY 1. Idea that the WATER is the main form of matter ( 600 B.C.) 2. Idea that the AIR is the main form of matter (546 B.C.)

Answer 29

Thales Anaximenes

Question 30

TIMELINE IN CHEMISTRY 3. Idea that the FOUR ELEMENTS (fire, water, earth, air) combine in different proportions (450 B.C.) 4. Idea of the age of atom/atomism ( 420 B.C)

Answer 30

Empedocles Leucippus and Democritus

Question 31

5. the SCEPTICAL CHEMIST (1661) 6. Discovery of HYDROGEN (1766)

Answer 31

Robert boyle H. Cavendish

Question 32

7. discovery of the COMPOSITION OF AIR (1775) 8. Devised the MODERN symbols of elements (1820)

Answer 32

A. Lavosier John Jacob Berzelius

Question 33

9. PERIODIC LAW And designed the modern periodic table of elements (1869) 10. proposed the STRUCTURE of the atom; discovery of the ELECTRON (1897)

Answer 33

Dmitri Mendeleev J.J Thomson

Question 34

11. proposed the NUCLEAR atom; Discovery of a NUCLEUS (1911) 12. Proposed the ENERGY LEVELS in atoms (1913)

Answer 34

E. Rutherford Niels Bohr

Question 35

1. Coconut as source of chemicals. Extracting residual COCONUT OIL 2. Gained recognition for his researches on natural products. Work on ALKELOIDS 3. Contribute to the biochemistry of TOXIC PEPTIDES (active peptides)

Answer 35

DR. Julian A. Banzon DR. Alfredo Santos DR. Lourdes J. Cruz

Question 36

4. Worked on the chemistry of Natural products. Resulted in the production of NEW FLAVORS and HERBAL MEDICATION 5. STARCH and protein relation to GRAIN QUALITY of RICE 6. Expertise on MUTAGENS, ANTI-MUTAGENS and Bio-organic reaction 7. MEDICAL DOCTOR, worked on SODIUM and POTASSIUM (cholesterol)

Answer 36

DR. Luz Oliveros Belardo DR. Bienvenido Juliano Clara Y. Lim-syliangco DR. Solita Camara-Besa