Honors Chemistry Practice Test Final 1

Contains more matter

A Golf Ball has more mass than a tennis ball because it___. A. Takes up more space B. Contains more matter C. Contains different kinds of matter D. Has a definite composition

H^2

A molecule with a single covalent bond is ___. A. CO^2 B. H^2 C. CO D. N^2

Compound

A substance that can be separated into two or more substances only by a chemical change is a(n)___.

Pairs of Valence Electrons

According to VSEPR Theory, molecules adjust their shapes to keep which of the following as far apart as possible? A. Pairs of Valence Electrons B. Inner Shell electrons C. Mobile Electrons D. The Electrons Closest to the Nuclei

Number of Protons

All Atoms of the same element have the same___. A. Number of Neutrons B. Number of Protons C. Mass Numbers D. Mass

ability to rust

All of the following are physical properties of matter EXCEPT___. A. Mass B. Color C. Boiling Point D. Ability to Rust

Rusting

All of the following changes to a metal are physical changes EXCEPT___. A. Bending B. Melting C. Rusting D. Polishing

A Polyatomic Anion

An -ate or -ite at the end of a compound name usually indicates that the compound contains__. A. Fewer electrons than protons B. Neutral Molecules C. Only two elements D. A Polyatomic Anion

Heck Yeah I am!

Are you going to Pass this Final!? A. Idk B. Heck Yeah I am! C. Maybe D. Nope...no possible way.

Higher

Compared with the Electronegativities of the elements on the left side of a period, the electronegativities of the elements on the right side of the same period tend to be__. A. Lower B. Higher C. The Same D. Unpredictable

drops from a higher to a lower energy level

Emission of light from an atom occurs when an electron___. A. Drops from a higher to a lower energy level B. Jumps from a lower to a Higher Energy Level C. Moves within its atomic orbital D. Falls into the nucleus

21.7 m

Express the sum of 5.2m and 16.53m using the correct number of significant digits. A. 21.73 m B. 21.7 m C. 21 m D. 22 m

They are inversely proportional to each other

How are the frequency and wavelength of light related? A. They are inversely proportional to each other B. Frequency equal wavelength divided by the speed of light C. Wavelength is determined by dividing frequency by the speed of light D. They are directly proportional to each other

2

How many electrons does barium have to give up to achieve a noble-gas electron configuration?

50 Protons, 50 Electrons, 75 Neutrons

How many protons, electrons, and Neutrons does an atom with atomic number: 50 and mass number: 125 contain? A. 50 Protons, 50 Electrons, 75 Neutrons B. 75 Electrons, 50 Protons, 50 Neutrons C. 120 Neutrons, 50 Protons, 75 Electrons D. 70 Neutrons, 75 Protons, 50 Electrons

3

How many unpaired electrons are in phosphorus (Atomic Number 15)?

5

How many valance electrons are in an atom of Phosphorus

The Density Increases

If the temperature of a piece of Iron decreases, what happens to its density? A. The Density decreases B. The Density increases C. The Density does not change D. The Density first increases, then decreases

Sodium Nitrite

Name the Compound: NaNO2

It is an acid

Suppose you encounter a chemical formula with H as the cation. What do you know about this compound immediately? A. It is a polyatomic Ionic Compound B. It is an acid C. It is a base D. It has a +1 Charge

A Hydrocarbon

The Complete combustion of which of the following substances produces carbon dioxide and water? A. A Hydrocarbon B. A Binary Ionic Compound C. A ternary Ionic Compound D. A molecular compound

2.34 x 10^-7

The Diameter of an atom is 0.000000234m. What is this number expressed in Scientific Notation? A. 2.34 x 10^6 B. 2.34 x 10^-7 C. 1.54 x 10^7 D. 1.54 x 10^-6

Atom

The Smallest particle of an element that retains the properties of that element is a(n)___. A. Atom B. Electron C. Proton D. Neutron

3.9 g/L

The molar of a certain gas is 88g. What is density of the gas in g/L at STP? A. 2.9 x 10^-24 g/L B. 0.25 g/L C. 3.9 g/L D. 1900 g/L

No reaction takes place because copper is less reactive than potassium

Use the activity series of metals to complete a balanced chemical equation for the following single replacement reaction CU(s) + KNO3 (aq) --> A. CuNO3 + K B. CuK + NO3 C. CuKNO3 D. No reaction takes place because copper is less reactive than potassium

Rb(PO4)3 +H2O

What are the correct formulas and coefficients for the products of the following double-replacement reaction? RbOH + H3PO4 --> A. Rb(PO4)3 + H2O B. RbPO4 +2H2O C. Rb3PO4 + 3H2O D. H3Rb + PO4OH

Van der Waals Forces

What are the weakest attractions between molecules?

Repulsive forces between unshared pairs of electrons

What causes a molecule to have a bent shape, according to VSEPR Theory? A. Repulsive forces between unshared pairs of electrons B. Interaction between the fixed orbitals of the unshared pairs of oxygen C. Ionic attraction and Repulsion D. The unusual location of the free electrons

They have mobile Valence Electrons

What characteristic of metals makes them good electrical conductors? A. They have mobile valence electrons B. They have mobile protons C. They have mobile cations D. Their crystal structures can be rearranged easily

Mixtures can be separated physically, while substances cannot

What distinguishes a substance from a mixture? A. Substances are compounds, and mixtures are not B. Mixtures are groupings of elements and substances are not C. Samples of the same substance can have different intensive properties D. Mixtures can be separated physically, while substances cannot

The Mass Number

What does the number 12 in the name Carbon-14 represent? A. The Atomic Number B. The Mass Number C. The Sum of the Protons and Electrons D. Twice the number of Protons

Sodium

What element in the 3rd Period has the largest atomic radius? A. Sodium B. Aluminum C. Chlorine D. Argon

A compound can only be separated into its components by chemical means

What is one difference between a mixture and a compound? A. A compound consists of more than one phase. B. A compound can only be separated into its components by Chemical means C. A mixture can only be separated into its components by chemical means D. A mixture must be uniform in composition

H3PO3

What is the Formula for Phosphorous Acid?

3 x 10^-23 J

What is the approximate energy of a photon having a frequency of 4 x 10^10 Hz? (h=6.6 x 10^-34 J-s) A. 3 x 10^-23 B. 3 x 10^-27 C. 2 x 10^4 D. 3 x 10^42

A Positive Charge

What is the charge of a cation? A. A Positive Charge B. No Charge C. A Negative Charge D. The Charge depends on the size of the nucleus

2+

What is the charge on the cation in the ionic compound calcium sulfide?

Na2SO4

What is the correct formula for sodium sulfate?

Dinitrogen Pentoxide

What is the correct name for N2O5?

Cobalt (II) Chloride

What is the correct name for the compound CoCl2

6.52 g/L

What is the density at STP of the gas sulfur hexafluoride, SF6? A. 0.153 g/L B. 6.52 g/L C. 0.195 g/L D. 3.93 x 10^24 g/L

1s^2, 2s^2, 2p^6, 3s^2, 3p^6, 4s^2

What is the electron configuration of Calcium?

SO3

What is the empirical formula of a compound that is 40% sulfur and 60% oxygen by weight?

H2S

What is the formula Hydrosulfuric Acid?

Nitric Acid

What is the name of HNO3

0

What is the net charge of the Ionic compound lithium bromide?

0.296 mol

What is the number of moles in 6.62L of H2S gas at STP? A. 4.36 mol B. 0.296 mol C. 0.195 mol D. 148 mol

62.1%

What is the percent by mass of Carbon in Acetone, C3H6O (To the nearest tenth)?

.53 mL

What is the volume of 5.6 g of silver if the Density of silver is 10.5 g/mL

5 x 10^-7 m^3

What is the volume of a salt crystal measuring 3.23 x 10^2 By 2 x 10^-3 By 7.1 x 10^-3 m? A. 5 x 10^-7 m^3 B. 4.6 x 10^-7 m^3 C. 5.0 x 10^-7 m^3 D. 4.59 x 10^-7 m^3

Strontium and Nitrogen

What of the following pairs of elements is most likely to form an ionic compound? A. Strontium and Nitrogen B. Oxygen and Sulfur C. Oxygen and Nitrogen D. Calcium and Aluminum

Violet

Which Color of visible light has the shortest wavelength?

top soil

Which of the Following is a heterogeneous mixture? A. Saline Solution B. Gatorade from vending machine C. Mixture of metal like sterling silver D. Top Soil

Mn2S3

Which of the following compounds contains the Mn^3+ Ion? A. MnO B. MnBr2 C. Mn2S3 D. MnO

H--F

Which of the following covalent bonds is the most polar? A. H--F B. H--C C. H--N D. H--N

Magnesium and Argon

Which of the following elements are in the same period as sulfur? A. Magnesium B. Lithium C. Argon D. Oxygen

Lithium

Which of the following elements has the lowest electronegativity A. Lithium B. Carbon C. Bromine D. Fluorine

Silver Tarnishes

Which of the following indicates that a chemical change has happened during cooking? A. Silver Tarnishes B. Bubbles form in boiling water C. Puddle of Water Freezes D. Energy is transferred from the stove to a pan

PbO2 --> Pb + O2

Which of the following is a balanced equation representing the decomposition of Lead (IV) oxide? A. PbO2 --> Pb + 2O B. Pb O2 --> Pb + O2 C. Pb2O --> 2PB + O D. PbO --> Pb + O2

Steel

Which of the following is a homogeneous mixture? A. Steel B. Beef Stew C. Sand and Water D. Granite

freezing

Which of the following is a physical change? A. Corrosion B. Explosion C. Freezing D. Rotting of Food

The mass of a neutron nearly equals the mass of a proton

Which of the following is true about subatomic particles? A. Electrons are negatively charged and are the heaviest subatomic particle B. Protons are positively charged and the lightest subatomic particle C. Neutrons have NO charge and are the lightest subatomic particle D. The mass of a neutron nearly equals the mass of a proton

The Total mass of the reactants equals the total mass of the products

Which of the following is true for all chemical reactions? A. The total mass of the reactants increases B. The Total mass of the products is greater than the total mass of the reactants C. The total mass of the products is less than the total mass of the reactants D. The total mass of the reactants equals the total mass of the products

Electrons are negatively charged and have a mass of 1 amu

Which of the following statements is NOT true? A. Protons have a positive Charge B. Electrons are negatively charged and have a mass of 1 amu C. The Nucleus of an atom is positively charged D. Neutrons are located in the nucleus of an atom

Cations form when an atom loses electrons

Which of the following statements is true about Ions? A. Cations Form when an atom gains electrons B. Cations Form when an atom loses electrons C. Anions Form when an atom gains protons D. Anions Form

Atoms are tiny indivisible Particles

Which of the following was originally a tenet of Dalton's atomic theory, but had to be revised about a century ago? A. Atoms are tiny indivisible particles B. Atoms of the same element are identical C. Compounds are made by combining atoms D. Atoms of different elements can combine with one another in simple whole number ratios

liquid

Which state of matter is characterized by having an indefinite shape, but a definite volume? A. Gas B. Liquid C. Solid D. None of the Above

Electronegativity generally increases from left to right across a period

Which statement is true about electronegativity? A. Electronegativity is the ability of an anion to attract another anion B. Electronegativity generally increases as you move from top to bottom within a group C. Electronegativity generally is higher for metals than for nonmetals D. Electronegativity generally increases from left to right across a period

Wavelength

Which variable is inversely related to frequency? A. Wavelegth B. Velocity C. Position D. Energy