VSEPR & MO Theory
Which molecular geometry is associated with an sp² hybridized atom?
Trigonal Planar
How many moles of compound are in 78.25 g of CO₂?
1.78 mol
Balance the following chemical equation: Cr + S₈ → Cr₂S₈.
2Cr + S₈ → Cr₂S₈.
Which of the following products will produce a precipitate; Hg₂SO₄, KOH, HNO₃?
Hg₂SO₄
Assign oxidation numbers to each of the atoms in Ca(NO₃)₂.
Ca = +2
N = +5
Predict the molecular geometry for the following molecule, including bond angles: TeF₄
Tetrahedral, 109.5o
How many hydrogen atoms are present in 76.45 g of ammonium sulfate?
2.79E24 atoms
How many moles of solid copper can be formed by the reaction of 4.59 g of CuO and 2.73 g of C in the following reaction?
CuO + C → Cu + CO₂
0.058 mol Cu
What volume of 1.75 M HCl should be used to prepare a 3.5 L solution of 0.55 M HCL?
1.1 L
Identify the oxidizing and reducing agents in the redox reaction below.
Cu + 2Ag⁺ → 2Ag + Cu²⁺
Oxidizing agent: Ag+
Which of the following molecules contains a dipole moment? BF₃, CF₄, or NF₃
NF₃
A compound that contains only carbon, hydrogen, and oxygen is 48.64% C and 8.16% H by mass. What is the empirical formula of this substance?
C₃H₆O₂
Calculate the molarity of a 5.623 g sample of NaHCO₃ that is dissolved in water to create 250 mL of solution.
0.2677 M
Strong acids: HCl, HBr, HI, HNO₃, H₂SO₄, HClO₄
Strong bases: LiOH, NaOH, KOH, Ca(OH)₂, Sr(OH)₂, Ba(OH)₂
Balance the following redox reaction: Zn + H₂SO₄ -> ZnSO₄ + H₂
Zn + H₂SO₄ -> ZnSO₄ + H₂
What is the bond order of XeF⁻? Is it paramagnetic or diamagnetic?
0, diagmagnetic
Which of the following compounds has a greater mass percent of carbon: C₁₂H₂₂O₁₁ OR C₈H₁₀N₄O₂?
C₈H₁₀N₄O₂
Calculate the concentrations of all ions in 0.100 moles of Ca(NO₃)₂ in 100 mL of solution.
[Ca²⁺]= 1.00 M, [NO₃⁻]=2.00 M
A 25.00-mL sample of hydrochloric acid solution requires 24.16 mL of 0.106M sodium hydroxide for complete neutralization. What is the concentration of the original hydrochloric acid solution?
0.102 M
Balance the following redox reaction: PbO + NH₃→ N₂ + H₂O + Pb
3PbO + 2NH₃→ N₂ + 3H₂O + 3Pb
Name all of the hybrid orbitals and how many bonding groups they are associated with.
Sp: 2 bonding groups
Sp²: 3 bonding groups
Sp³: 4 bonding groups
Dsp³: 5 bonding groups
D²sp³: 6 bonding groups
A given sample of a xenon fluoride compound contains molecules of the type XeFₙ, where N is some whole number. Given that 9.033 x 10²⁰ molecules of XeFₙ weigh 0.368 g, determine the value for N in the formula.
6
What mass of solid AgBr is produced when 100.0 mL of 0.150 M AgNO₃ is added to 20.0 mL of 1.00 M NaBr?
2.82g AgBr
What volume of 0.0521 M Ba(OH)₂ is required to neutralize exactly 14.20 mL of 0.141 M H₃PO₄?
57.6 mL or 0.0576 L
Balance the following redox reaction in acidic/aqueous conditions: Cr₂O₇²⁻ + C₂H₅OH →Cr³⁺ + CO₂
16H⁺ + 2Cr₂O₇²⁻ + C₂H₅OH → 4Cr³⁺ + 2CO₂ + 11H₂O