Kim Namjoon
The correct chemical name for H₂SO₄?
Sulfuric Acid
What is the empirical formula for C₄H₁₀O₂?
C₂H₅O
What is the correct chemical name for HNO₃?
Nitric Acid
What is the correct chemical name for HCl?
Hydrochloric Acid
What is the correct chemical formula for iron (III) phosphate?
FePO₄
What is the correct chemical formula for CuCO₃?
Copper (II) Carbonate
What is the oxidation number of chlorine in ClO₄-
-1
What is the oxidation number of the chromium atom in K₂Cr₂O₄?
+3
Does an oxidizing agent gain or lose electrons?
Gain Electrons
Which species functions as the reducing agent in the following oxidation-reduction reaction?
ZnO (s) + C (s) → Zn (s) + CO (g)
C (s)
What is the oxidation number of sulfur in BaSO₄?
+6
Calculate the wavelength (in nm) of the blue light emitted by a mercury lamp with a frequency of 6.88 x 10¹⁴ Hz.
436 nm
A volume of 41.1 mL of aqueous KOH was titrated against a standard solution of H₂SO₄. What was the molarity of the KOH solution if 17.9 mL of 1.23 M H₂SO₄ was needed?
2 KOH (aq) + H₂SO₄ (aq) → K₂SO₄ (aq) + 2 H₂O (l)
1.07 M
In general, electronegativity __________ as you go across a row in the periodic table and __________ as you go down a group.
Increases, Decreases
Where on the periodic table do you find the elements that can accommodate more than eight electrons in their valence shell?
period 3 and below
A flask containing 233 mL of 2.22 M HBr was accidentally knocked to the floor. How many grams of K₂CO₃ (138.21 amu) would you need to put on the spill to neutralize the acid according to the following equation?
2 HBr (aq) + K₂CO₃ (aq) → 2 KBr (aq) + CO₂ (g) + H₂O (l)
35.7 g
How many lone pair(s) of electrons are on the P atom in PF₃?
1
Element A has an electronegativity of 0.8 and element B has an electronegativity of 3.0. Which statement best describes the bonding in A₃B?
The compound is largely ionic with A as the cation.
Compound A is a solid with a melting point of 125ᵒC, and compound B is a gas at 25ᵒC and one atmosphere pressure. Based on these data, one would expect
Both Compounds to be covalent.
What is the O to O bond order in O₂?
2
What is the bond angle in the SO₂ molecule?
120ᵒ
What is the maximum number of electrons in the n = 4 energy level?
32
What is the energy (in joules) for a mole of photons associated with a wavelength of 480 nm?
2.49e5 J/mol
What is the correct electron configuration for silver?
[Kr] 5s¹ 4d¹⁰
How many unpaired electrons are there in a Fe³⁺ ion?
5