Exam Review #2

Electron Configurations/Energy Diagrams/Ions

100

What is the abbreviated electron configuration for Yitrium?

[Kr]5s²4d¹

200

How many unpaired electrons does Nickel have?

2

300

An atom has 49 protons and 47 electrons, write the element with the correct formal charge

Ir²⁺

400

The electron configuration of Se^3- is the same as what noble gas?

Krypton

500

What is the electron configuration of Copper?

1s²2s²2p⁶3s²3p⁶4s¹3d¹⁰

Naming

100

What is the chemical formula for dinitrogen tetroxide?

N₂O₄

200

What is the name of this molecule: Li₂S? Is it ionic or covalent?

Lithium Sulfide, ionic

300

What is the name for Hg(CN)₂?

Mercury (II) Cyanide

400

What is the chemical formula for Aluminum Sulfate?

Al₂(SO₄)₃

500

What is the name for the chemical formula Pb(IV) Acetate?

Pb(C₂H₃O₂)₄

Lewis Dot Structures/VESPR

100

Draw the Lewis Dot Structure for CHCl₃. Is it a polar or non polar molecule?

Polar

200

What is the difference between bond polarity and molecule polarity?

Bond Polarity - describes sharing of electrons between two bonded atoms

Molecular Polarity - describes electron distribution across entire molecule

300

What is the electron geometry and molecular geometry of OCl₂. What is the greatest intermolecular force?

Electron Geometry - tetrahedral 

Molecular Geometry - bent

IMF - dipole-dipole

400

What is the molecular/electron geometry of MgCl₂? Is it polar or non polar? What is the strongest intermolecular force?

Molecular Geometry - Linear

Electron Geometry - Linear

Nonpolar

Dispersion 

500

What is the electron and molecular geometries of ammonia. What is the strongest intermolecular force? Is it a polar or non polar molecule? What type of bonds does it have?

Electron geometry - tetrahedral

Molecular geometry - trigonal pyramidal 

IMF - hydrogen-bonding

Polar

Polar covalent bonds

Conversions/Balancing Equations

100

What is the number of moles of Hydrogen in 0.40 moles of ammonia?

1.2 moles of Hydrogen

200

What is the molar mass of sucrose (C₁₂H₂₂O₁₁)?

342.3 g/mol

300

Balance this equation:

C₄H₁₀ + O₂ -----> H₂O + CO₂

2, 13, 10, 8

400

How many grams are in 7.20 x 10²⁴ molecules of NaCl?

699g NaCl

500

How many g of water are produced if 34.2 g of oxygen are reacted?

2H₂ + O₂ -----> 2H₂O

38.5g water

Types of Reactions

100

What kind of reaction is this?

2HgO(s) -----> 2Hg(l) +O₂(g)

Decomposition 

200

What kind of reaction is this?

Zn(s) + 2HCl(aq) ----> ZnCl₂(aq) + H₂(g)

Single Replacement 

300

What type of reaction is this?

BaCl₂(aq) + K₂SO₄(aq) -----> BaSO₄(s) + 2KCl(aq) 

Double Replacement 

400

Is Aluminum being oxidized, reduced, neither or both?

4Al(s) ----> 4Al³⁺ + 12e^-

Oxidized 

500

Is Sulfur being oxidized, reduced, neither, or both?

S + 2e^- -------> S^2-

Reduced