I Study Chemistry Periodically
This periodic trend describes the amount of energy required to lose an electron, and generally increases across the Periodic Table
What is ionization energy?
This type of bond describes electrons that are shared equally in diatomic molecules
What is a nonpolar covalent bond?
If propane (C3H8) combusts completely, then this many moles of water should form
What is 4?
(C3H8 + 5O2 --> 3CO2 + 4H2O)
What is endothermic?
The Ideal Gas Law utilizes the Ideal Gas Constant, R, whose value is 0.08206 and units are
What is L atm per mol K?
This experiment helped Rutherford to identify the existence of the dense, positively charged nucleus
What is the gold-foil experiment?
The concept of two valid Lewis structures having atoms in the same locations but bonds and electrons in different ones
What is resonance?
The empirical formula of tetranitrogen octaoxide
What is NO2?
The only state of matter upon which thermodynamic work can be done
What is a gas?
The gas constant 8.3145 J/mol K is used in determining the average velocity of a gas because the Joule is equal to these SI units
(1 J = 1 kg m2 s-2)
Sometimes called ferric oxide, this is the accepted IUPAC name for Fe2O3
What is iron (III) oxide?
What is square pyramidal?
The volume of 0.500 M sodium hydroxide needed to neutralize 27.0 mL of 0.350 M sulfuric acid
What is 37.8 mL?
The total number of atoms in a body centered cubic unit cell
What is 2?
(1/8 at each corner, 1 in the center)
If 0.50 kJ of heat are absorbed into a system at 1.0 atm where the volume expands by 5.0 L, the total energy change would be equal to
What is -6.5 J?
E = q + w, where q = +500 J and w = - 5 L atm;
-5 L atm = -506.5 J; then
E = 500 - 506.5 = -6.5 J
The chemical equation that describes the lattice energy of lithium chloride
What is Li+(g) + Cl-(g) --> LiCl(s)?
The reason why PH5 can exist but NH5 cannot
What is an expanded octet (or d orbitals)?
If lead nitrate and potassium chloride solutions are combined, this net ionic equation will result
What is Pb2+(aq) + 2Cl-(aq) --> PbCl2(s)?
The oxidation state of the metal in Co3(PO4)2
What is +2?
Hydronium ions have a concentration of 0.0001 M in solution, so this is the value of the pOH
What is 10?
The correct electron configuration of an atom of silver
What is [Kr]5s14d10?
When calcium and sulfur combine to form calcium sulfide, both ions are isoelectronic with this atom
What is argon?
The First Law of Thermodynamics proves that energy transactions in the universe are balanced, and can be written mathematically as the sum of these two path functions
What is E = q + w?
3.75 moles of an ideal gas at STP would occupy this volume
What is 84.0 L?
(3.75 mol x (22.4 L/1 mol))
because 1 mol ideal gas at STP = 22.4 L based on PV=nRT
The number of nanometers in a meter
What is 1 billion?