Chem 100 Lec: EXAM 1 PRACTICE (Without Combine)

CHEM100 LEC

What is the Smallest Unit to Largest Unit according to their Magnitude

Microliter

Milliliter

Centiliter

Deciliter

Liter

Kiloliter

What is the Definition of Specific Heat?

The amount of heat required to increase the temp of 1g of a substance by 1 °C

What are the Names for Diatomic Elements?

Bromine

Hydrogen

Iodine

Fluorine

Nitrogen

Oxygen

Chloride

What are the Chemical Formulas for Diatomic Elements?

Br2

H2

I2

F2

N2

O2

Cl2

Would the properties change when a solid like dry ice is transformed to gas?

The Mass is

Same

Would the properties change when a solid like dry ice is transformed to gas?

The Composition is

Same

Would the properties change when a solid like dry ice is transformed to gas?

The Density is

Changes/Different

Would the properties change when a solid like dry ice is transformed to gas?

The Physical State is

Changes/Different

Is N2 an Element or a Compound?

Element

Is CO2 an Element or a Compound?

Compound

Is O2 an Element or a Compound?

Element

Is He an Element or a Compound?

Element

Is NO2 an Element or a Compound?

Compound

When you have Dissolved a Small Amount of Sugar in Water, you have prepared What?

A Mixture

Is Sugar Dissolved in Water Homogeneous or Heterogeneous?

Homogeneous

Atomic Mass

The Kinetic Energy of the Particles Increases as the Temperature blanks

Increases

True or False: The pressure exerted on the inner wall of a vessel containing a sample of gas is due to the collisions of the gas particles with the inner wall

True

True or False: H3PO4 is a molecule of a compound

True

True or False: H3PO4 is a homogeneous mixture

False

True or False: H3PO4 is a heterogeneous mixture

False

True or False: H3PO4 is an element

False

True or False: H3PO4 is a compound

True

True or False: A compound is a pure substance made of elements which are combined chemically

True

True or False: A compound is a pure substance that can be decomposed into components (That is, into simpler substances) by chemical means only

True

True or False: A compound is a pure substance that can be decomposed into components (That is, into simpler substances) by physical means only

False

When Heat is Added to a Mixture of Ice and Water at 0 °C, we expect the Temperature of the Mixture to:/ Explain your Answer

Remain the same. Heat is used to break the bonds (Energy) between the particles in ice. The temperature will increase only after all the ice has melted.

True or False: Compounds cannot be decomposed into simpler substances

False

True or False: Compounds can be decomposed by physical means into simpler substances

False

True or False: Compounds can be decomposed into simpler substances by chemical means

True

True or False: Mixtures cannot be decomposed into simpler substances

True or False: Mixtures can be decomposed by physical means into simpler substances

Energy due to Position or Composition is Called

Potential Energy

Energy due to Motion is Called

Kinetic Energy

Give the Names of Any Transition Elements (Name Three)

• Scandium

• Titanium

• Vanadium

• Chromium

• Manganese

• Iron

• Cobalt

• Nickel

• Copper

• Zinc

• Yttrium

• Zirconium

• Niobium

• Molybdenum

• Technetium

• Ruthenium

• Rhodium

• Palladium

• Silver

• Cadmium

• Hafnium

• Tantalum

• Tungsten

• Rhenium

• Osmium

• Iridium

• Platinum

• Gold

• Mercury

Give the Chemical Symbols of any Transition Elements (Name Three)

• Sc

• Ti

• V

• Cr

• Mn

• Fe

• Co

• Ni

• Cu

• Zn

• Y

• Zr

• Nb

• Mo

• Tc

• Ru

• Rh

• Pd

• Ag

• Cd

• Hf

• Ta

• W

• Re

• Os

• Ir

• Pt

• Au

• Hg

Atomic Number

Physical or Chemical Change: A red solution turns green

Chemical Change

Physical or Chemical Change: Bubbles form when baking soda is mixed with lemon juice

Chemical Change

Physical or Chemical Change: Sulfur is melting

Physical Change

Physical or Chemical Change: Oil is freezing

Physical Change

Name an Element in the Same Period as Copper

• Potassium

• Calcium

• Scandium

• Titanium

• Vanadium

• Chromium

• Manganese

• Iron

• Cobalt

• Nickel

• Zinc

• Gallium

• Germanium

• Arsenic

• Selenium

• Bromine

• Krypton

What is the Definition of Boiling Point?

The temp at which the vapor pressure is equal to the external pressure (Pressure of atmosphere)

Will the Composition of a Substance Change when it Undergoes a Chemical Change?

Yes

Will the Composition of a Substance Change when it Undergoes a Physical Change?

No

How will the volume of a certain sample of gas change at constant pressure if the temperature is increased?

The Volume Increase

How will the pressure of a certain sample of gas change at constant volume if the temperature is increased?

The Pressure Increase

How will the volume of a certain sample of gas change at constant temperature if the pressure is increased?

The Volume Decrease

If the Number of Gas Particles are Increased at a Constant Temperature, the Volume of the Gas will blank to maintain Constant Pressure.

Increase

The Lower the Atmospheric Pressure, the blank the Boiling Point of a Liquid

Lower

The Atmospheric Pressure in Big Bear Mountain is blank in the San Fernando Valley

Lower than

The Higher the Attractive Forces between the Molecules of a Liquid, the blank the Vapor Pressure of the Liquid

Lower

What is the Definition of the Law of Definite Composition?

The percent by mass of the elements in a compound that is fixed

A Technique used for Separating Solid from Liquid using Filter Paper is called

Filtration

The Liquid that goes through the Filter Paper during Filtration is called

Filtrate

The Solid that remains on the Filter Paper is called

Residue

Elements that are Members of the Same Horizontal Row on the Periodic Table are said to belong to the Same blank

Period

Elements that are Members of the Same Vertical Column on the Periodic Table are said to belong to the Same blank

Family

When Atoms of the Same or Different Elements are combined chemically to form a unit, the Unit is called a

Molecule

A blank is composed of particles made of different elements combined chemically in a fixed proportion (Fixed ratio) by mass

Compound

Name all Alkali Metals

• Lithium (Li)

• Sodium (Na)

• Potassium (K)

• Rubidium (Rb)

• Cesium (Cs)

• Francium (Fr)

Alkali Metals

Name all Alkaline Earth Metals

• Beryllium (Be)

• Magnesium (Mg)

• Calcium (Ca)

• Strontium (Sr)

• Barium (Ba)

• Radium (Ra)

Name all Halogens

• Fluorine (F)

• Chlorine (Cl)

• Bromine (Br)

• Iodine (I)

• Astatine (At)

Name all Noble Gases

• Helium (He)

• Neon (Ne)

• Argon (Ar)

• Krypton (Kr)

• Xenon (Xe)

• Radon (Rn)

Alkaline Earth Metals

Transition Metals

Halogens

Noble Gases