Summative Test #1

Question 1

• is a symbolic expression of a compound or substance.
• It is also described as shorthand of expressing the types and the number of atoms in a substance.

Answer 1

Chemical Formula

Question 2

Two Types of Formulas

Answer 2

• Molecular formulas
• Empirical formulas

Question 3

• Shows the exact number of atoms of each element in the smallest
  unit of a substance.

Answer 3

Molecular Formula

Question 4

• It tells us which elements are present and the simplest whole number ratio of their atom.

Answer 4

Empirical Formula

Question 5

C3H8O3

Answer 5

Glycerol (Glycerin)

Question 6

NaCI

Answer 6

Salt (Sodium Chloride)

Question 7

NaCIO

Answer 7

Chlorox

Question 8

a.NH3

Answer 8

Ammonia

Question 9

NaHCO3

Answer 9

Baking Powder

Question 10

-is the final good that is
bought by individuals or
households for personal
use.
-are goods that are bought for
consumption by the
average consumer.

Answer 10

Consumer Product

Question 11

*Product Name
*Manufacturer’s Information (Name, Address, Contact)
*Ingredients (for food, cosmetics, etc.)
*Net Weight or Volume
*Batch or Lot Number
*Expiry Date or Best Before Date
*Usage Instructions
*Safety Warnings (if applicable)
*Country of Origin
*Barcodes (if used)
*Regulatory Symbols and Certifications
*Additional Information (nutrition, dosage, care, etc.)
*Language Requirements
*Graphic Design and Layout (clear and legible)

Answer 11

DTI required labels for a product

Question 12

It is the process of separating the
insoluble solid from the liquid
substance by allowing the liquid to
pass through a porous material called filtering agent

Answer 12

Filtration

Question 13

-observable characteristics, traits or qualities of matter.

Answer 13

Properties of Matter

Question 14

-without changing the composition of a substance
-has two types: extensive, intensive
-ex. phase, color, solubility, density, melting/boiling points, volatility, viscosity, conductivity

Answer 14

Physical Properties

Question 15

-with an accompanying change in the chemical composition of a substance
-ex. flammability, chemical reactivity

Answer 15

Chemical Properties

Question 16

separates the liquid layer known as supernatant and a heavy insoluble solid known as precipitate by allowing the said solid to settle at the bottom of the container then the liquid above the solid is poured off carefully into another container.

Answer 16

Decantation

Question 17

-involves forceps, sieves, magnets, and other similar tools to separate the components of mixtures
-sand and gravel are separated by passing the mixture over a wire screen

Answer 17

Mechanical Separation

Question 18

-evaporation and condensation of a liquid solvent from a mixture or solution
-uses the difference in boiling points of the components of a mixture

Answer 18

distillation

Question 19

-uses the difference in the degrees to which substances are absorbed on the surface of an inert substance such as a filter paper

Answer 19

chromatography

Question 20

chemical decomposition or breakdown produced by passing an electric current through a liquid or solution containing ions.

Answer 20

electrolysis

Question 21

uses a motor device known as a centrifuge that speeds up the settling of the precipitate using centrifugal or rotating motion

Answer 21

centrifugation

Question 22

-derived from the greek words isos and topos which means “the same place”
-variants of an element are still found in the same location in the periodic table of elements
-british chemist frederick soddy

Answer 22

isotopes