Mid-Term Test Review 2015… Semester 2 These are typical questions that would be good examples for...
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Transcript of Mid-Term Test Review 2015… Semester 2 These are typical questions that would be good examples for...
Mid-Term Test Review 2015…
Semester 2 These are typical questions that would
be good examples for the test …
Gas Laws Unit
• Which of the following are the highest pressure? Show work…
• 124 kPa• 900 mm Hg• 1.18 atmospheres
Gas Laws Unit
• 3.5 moles of gas occupy a volume of 20 L at 400 kPa. What is the temperature of the gas in degrees Celsius?
Gas Laws Unit
• A container of helium is sealed at 22.0 °C and 1.40 atmosphere of pressure. What pressure would be exerted by the helium if the container were heated to 220.0 °C? (and container remained sealed)
Gas Laws Unit
• A gas balloon has a volume of 106.0 liters when the temperature is 45.0 °C and the pressure is 740.0 mm of mercury.
• What will its volume be at 20.0 °C and 780 .0 mm of mercury pressure?
Are the following molecular or empirical formulas? If it is a molecular formula write the empirical formula.
•A) Na2S2O4
•B) Fe4O6
•C) C3H8
• Determine the empirical formula for the following compounds based on their percent composition. Show your work and circle your answer.
• 60.9% As and 39.1% S
• Determine the energy for a Photon of Light whose Frequency is 2.5 x 1015 hertz. Put answer in correct unit.
Classify the following reaction and write a complete balanced equation.
• Butane vapors (C4H10) suddenly explode after a spark ignites them
Write the balanced chem eq…
• Aluminum bromide reacts with chlorine gas to yield aluminum chloride and bromine gas.
Write the balanced chem eq…
• Hydrochloric acid plus sodium hydroxide yield sodium chloride plus water.
• What is the wavelength (in centimeters) of a light wave that has a frequency of 7.05 x 1016 Hz
• Show the formula used for this calculation.
• Some colored light is passed through a prism and the following is observed.
• What would this be called , AND…• WHY are the different lines seen here present?
(explain as completely as you can. A diagram may be helpful)
• Explain (define) what electronegativity is AND show the trends both across the PT and up/down in families.
Draw a simple outline of the periodic table and…
• Show the trend for how ionization energy is periodic
• AND• Explain what ionization energy is a
measurement of...
• What is the trend for the atomic radii (atomic size) on the periodic table...– Across periods (horizontally) – Vertically (in families/groups)
• AND explain WHY for both…
Write the Noble gas (short hand) electron configuration for the following element…
• Calcium and Gold
• If Iodine has 7 valence electrons, what specific electron orbital or orbitals are those valence electrons found within and how many in each orbital
• If the titanium ion has a charge of +2, where did the 2 electrons get lost (or taken) from to form the Ti+2 ion?
Classify the following reaction and write a complete balanced equation.
• aluminum chloride reacts with potassium hydroxide
Classify the following reaction and write a complete balanced equation.
• sodium reacts with oxygen gas