| Periodic Table | Parts of an Atom | Formulas and Stoichiometry | Intermolecular Forces | Gases and Gas Laws |
|---|---|---|---|---|
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Period
Each horizontal row of the Periodic Table is know as a _______.
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Nucleus
The inner part of an atom that contains the proton and the neutron is called the __________.
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6.022 X 10^23
What is the numerical value for Avogadro's number, expressed to 4 significant figures?
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dipole-dipole, hydrogen bonds, London dispersion forces
Name three major types of intermolecular forces.
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.PV = nRT (pressure, volume, number of moles, gas constant, temperature)
State the ideal gas law, and define all symbols.
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Group (or Family)
Each horizontal row of the Periodic Table is know as a _______.
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Proton
These particles have a positive charge and are found inside the nucleus.
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CH3
What is the empirical formula for ethane, C2H6 ?
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boiling point, melting point, vapor pressure, viscocity, capillary action
Name 3 properties of condensed phases which depend upon intermolecular forces.
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increases
What happens to the pressure of a gas that is heated at constant volume?
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Group 18 (noble gases)
What is the group number of Helium and Neon?
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Neutrons
These particles are located within the nucleus, and have no charge.
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2 (CH4 + 2 O2 -----> 2 H2O + CO2)
How many moles of water are formed when one mole of methane burns?
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hydrogen bonds
What is the strongest type of intermolecular force which can exist between neutral molecules?
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25 L (add 25% more gas, pressure increases by 25 %)
One mole of gas has a volume of 20 L under a given set of conditions. Another 0.25 mole of gas is added. What is the new volume? (assume T and P remain constant)
|
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The Transition Metals
Nickle, Copper, and Gold are part of which group?
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Electrons
These particles are negatively charge and are found outside the nucleus.
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18 g (H2 + 1/2 O2 ------> H2O, MW water = 18 g/mol)
What is the mass of water formed upon combustion of one mole of hydrogen gas?
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London dispersion forces, dipole-dipole
Which types of intermolecular forces are present in liquid carbon monoxide?
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5/6 atm, or 0.84 atm (5 moles He, 1 mole Ne, for six moles total, 5/6 of which is He)
20 g of He and 20 g of Ne are mixed under conditions in which the total pressure is 1 atm. What is the partial pressure of the helium?
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Halogens, 7 valence electrons
What is the group name of Group 17, and how many valence electrons does each of the elements have?
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Nucleus
Most of the mass of an atom is located here.
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sodium (Na + 1/2 Cl2 ------> NaCl (s) )
One mole of sodium metal reacts with one mole of chlorine gas to form NaCl. Which reagent is limiting (if any)?
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HF (because it is capable of hydrogen bonding)
Which compound has a higher boiling point, HF or HCl? Why?
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intermolecular forces, size of gas molecules
What two physical properties of a gas are ignored in the ideal gas law but accounted for in the van der Waals equation?
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