Conversions!
30 zorgs = ____ millizorgs?
16 blips = 1 zorg
4 zorgs = 1 skeet
17.5 skeets = 1 ynot
1 ynot = 250 becauses
30,000 millizorgs
What are the four quantum "numbers"?
1st number- energy level– directly related to the
electrons distance from the nucleus, energy of
the electron and how tightly electron is bound
2nd number- shape of orbital– (s,p,d,f) space
electron is likely to be located
3rd number- 3-D orientation (x, y, z axes)
4th number- spin of electron– electrons must be
spinning opposite directions
Name four of the unique characteristics of water.
Water has a high surface tension.
Water has a high boiling point for a molecule of its size.
Water has a high specific heat.
Water has a low vapor pressure.
Water is less dense as a solid (ice) than a liquid (water).
Water has a high viscosity.
What is the difference between a solute and a solvent?
Solute- minority substance in mixture (substance being dissolved)
Solvent- majority substance in mixture (substance doing the dissolving)
Name three characteristics of gasses.
Gasses have a mass
Take up space (have volume).
Exerts pressure everywhere, which changes
according to volume and temperature.
Different gases can move through each other
quite rapidly-Diffusion
Gasses are compressible
5675 blips = _____ zorgs?
16 blips = 1 zorg
4 zorgs = 1 skeet
17.5 skeets = 1 ynot
1 ynot = 250 becauses
354.7 zorgs
What is Aufbau Principle?
Electrons occupy the lowest energy level first
Rank the intermolecular forces from weakest to strongest.
London Dispersion, Dipole-Dipole, and Hydrogen Bonding
What would be the mass percent if you put 5.0 grams of NaCl in 20.0 grams of water?
20%
What Instruments are used to measure pressure of any gas?
Manometer (Closed and Open)
45 skeets = _____ becauses
Hint: this is going to require 2 conversion
factors.
16 blips = 1 zorg
4 zorgs = 1 skeet
17.5 skeets = 1 ynot
1 ynot = 250 becauses
642.8 becauses
What is the unabbreviated and abbreviated electron configurations for Bromine?
Unabbreviated: 1s22s22p63s23p64s23d104p5
Abbreviated: [Ar] 3d104s²4p⁵
Methane, CH4, and ammonia, NH3, have similar molecular weights. Which would have a higher boiling point? Why?
NH3 – Ammonia has Hydrogen Bonding IMFs (as well as London Dispersion & Dipole-Dipole). Methane only has London Dispersion.
Which of the following solutions of strong electrolytes contains the largest number of ions: 100.0 mL of 0.100 M NaOH, 50.0 mL of 0.200 M BaCl2, or 75.0 mL of 0.150 M Na3PO4?
NaOH = 0.02 mol ions
BaCl2 = 0.03 mol ions
Na3PO4 = 0.045 mol ions
Therefore Na3PO4 wins!
State whether pressure and volume are inversely proportional or proportional according to Boyle's law. Then write the equation.
Pressure and volume are inversely related.
P1V1 = P2V2
4.1 kilobecauses = _______ blips
Hint: Lots of conversions!
16 blips = 1 zorg
4 zorgs = 1 skeet
17.5 skeets = 1 ynot
1 ynot = 250 becauses
18368 blips
Who invented the gold foil experiment and what conclusions did he draw from it?
Rutherford invented the gold foil experiment. This experiment showed that the atom is mostly empty space with a tiny, dense, positively-charged nucleus.
How much energy, in kJ, is needed to heat 50.0 g of water at 20.0°C to steam at 100.0°C?
qtotal= 129kJ
If you have a solution of nitric acid with a density of 1.42 g/mL and the mass percent of 70%, what is the molarity, molality and mole fraction the solution?
Molarity: 15.8 M
Molality: 37.0 m
Mole Fraction: 0.399
A container is filled with oxygen, nitrogen and carbon dioxide gases to a pressure of 50.0 kPa. The pressure of oxygen gas is 20.0 kPa and the pressure of nitrogen is 25.0 kPa. What is the pressure of the carbon dioxide gas?
5.0 kPa
23.4 mskeets2 = _________ centiskeets2
16 blips = 1 zorg
4 zorgs = 1 skeet
17.5 skeets = 1 ynot
1 ynot = 250 becauses
23.4 mskeets2 = __0.234___ centiskeets2
The density of lead is 11.3 g/cm3. The density of a lead nucleus is 20,000 kg/cm3. Please explain why this is possible. Hint: It might be helpful to draw a diagram.
The very high density of a lead nucleus (20,000 kg/cm³) is possible because it reflects the fact that all the mass is concentrated in a very small volume, whereas the low density of bulk lead (11.3 g/cm³) results from the relatively large atomic size with electrons taking up most of the space.
A 20.0 g sample of ice at -10.0°C is mixed with 100.0 g of water at 80.0°C. Assuming all the ice melts, what is the final temperature of the mixture?
Tfinal=52.5°C
Name all four steps for solution stoichiometry.
Write the balanced equation with appropriate states.
Convert given molarity and volume to moles.
Use mole ratio to find moles of other reactant or moles of precipitate. *Determine the limiting reactant (if applicable).
Convert to desired unit (molarity, volume, or grams).
A sample of N2 is collected over water at 18.5 ℃. (Vapor pressure of water at 18.5 ℃ is 16 mm Hg) If the volume of the sample is 47.6 mL and the total pressure is 784 mm Hg, how many moles of N2 are present?
0.00201 moles.