Chapter 4
Chapter 6
Chapter 7
Chapter 8
Chapter 9
100
What is a precipitate?
When two aqueous solutions usually composed of a cation and anion come together to form a solid.
100
What sign should the standard enthalpy change have when heat is released from the system?
Negative
100
What is the relationship of wavelength, freqency, and speed of light?
wavelength X frequency = speed of light m X 1/s = m/s
100
How many electrons can fit into each orbital?
2 electrons
100
What is the trend of electronegativity?
Up is more and right is more.
200
What is a Bronsted Acid?
A molecule that donates a proton.
200
What is the difference between temperature and heat?
Temperature is the degree of intensity of heat, while heat measures the amount of energy in a system.
200
how do we calculate the energy of one photon from its wavelength?
Energy = Planck's constant (h) * ( speed of light / wavelength)
200
Which atom is smaller in the compound KCl? Explain why?
K, because a positive species would indicate a greater pull on the valence electrons causing it to have a smaller atomic radius.
200
What is a polar bond?
Usually a covalent bond that consists of two elements that have different electron negativity. So, an uneven distribution will occur causing one end of the molecule to be either partial positive or negative.
300
Define a Lewis acid and base.
Lewis acid accepts electrons and a Lewis base donates electrons.
300
What is the total energy of the universe?
0
300
What is the de broglie equation tell? and is it for significant for baseball?
Original it described the wave-like properties of electrons. So, for a baseballs ball it doesn't matter due to the scale of mass. Therefore, electrons the de broglie equation is significant.
300
What is the electron configuration of Fe+3?
[Ar]4s^02d^5
300
What is second most electronegative element?
Oxygen
400
What type of reaction is the following: Fe2O3(s)+2Al(s)→Al2O3(s)+2Fe(l)
Redox Reaction
400
What is ∆H when 765 g of PCl3 (137.3 g/mol) reacts according to the equation below? PCl3 (g) → P (s) + 3/2 Cl2 (g) ΔH°rxn = +302 kJ
1.68x10^3 kJ
400
Calculate the de Broglie wavelength of an electron with a speed of 6.00 × 106 m/s. mass electron: 9.109x10^-31 kg h = 6.626x10^-34 J*s
1.21x10^-10 m
400
What ionization energy level of Sr would have the highest energy difference? (1st, 2nd, 3rd,.....)
3rd
400
Define effective nuclear charge?
The relative intensity of attraction of an electron in an orital shell to the nucleus.
500
What type of reaction is this (hint could be two types): Zn(s) + 2 HCl(aq) → ZnCl2(aq) + H2(g)
Gaseous Evolution and Redox Reaction
500
Use the thermochemical equations below and Hess’s law to calculate ΔHrxn for the following reaction (make sure to show your work!): CS2 (l) + 6 H2O2 (l) → CO2 (g) + 6 H2O (l) + 2 SO2 (g) ΔHrxn = ? CS2 (l) + 3 O2 (g) → CO2 (g) + 2 SO2 (g) ΔHrxn = –1077 kJ H2 (s) + O2 (g) → H2O2 (l) ΔHrxn = –188 kJ H2 (g) + ½ O2 (g) → H2O (l) ΔHrxn = –286 kJ
-1665 kJ
500
A photon is emitted from a hydrogen atom at a wavelength of 434.08 nm. What n value did the electron relax to if it was initial at n=5?
n=2
500
Which bonding is referred to as a "sea of electrons."
Metallic
500
Draw the lewis structure for H3COOH
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