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chem 219 Final Exam with Questions Already 100% Answered
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chem 219 Final Exam with Questions Already 100% Answered
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chem 219 Final Exam with Questions Already100% Answered
Which of the following properties, in general, increase as we move left to right
across a period in the periodic table?
1. atomic radius
2. ionization energy
3. metallic character
A) 1 only
B) 2 only
C) 3 only
D) 1 and 2 only
E) 2 and 3 only - ✔✔B) 2 only
All the following statements concerning a sample of oxygen gas at 1.00 atm
pressure are true EXCEPT
A) the molecules are in constant rapid random motion.
B) the pressure exerted by gaseous oxygen is due to the impact of the molecules
with the walls of the container.
C) the average kinetic energy of the gaseous oxygen is inversely proportional to
the absolute temperature of the gas.
D) collisions between the gaseous molecules are elastic.
,E) the volume occupied by the oxygen molecules is negligible compared with the
size of the container. - ✔✔C) the average kinetic energy of the gaseous oxygen
is inversely proportional to the absolute temperature of the gas.
A bond in which an electron pair is unequally shared by two atoms is
A) ionic.
B) polar covalent.
C) nonpolar covalent.
D) coordinate covalent.
E) dipolar. - ✔✔B) polar covalent.
Which of the following statements is (are) true?
1. An excited atom can return to a higher energy level by emitting light energy.
2. An atom can be excited to a higher energy level by absorption of light energy.
3. The frequency and wavelength of light are inversely proportional.
A) 1 only
B) 2 only
C) 1 and 3 only
D) 2 and 3 only
E) 1, 2, and 3 - ✔✔D) 2 and 3 only
Solvent - ✔✔A liquid substance capable of dissolving other substances
, Solute - ✔✔A substance that is dissolved in a solution.
Solution - ✔✔A homogeneous mixture that forms when one substance
dissolves another.
The measure of the attraction that an atom has for the electrons in a chemical
bond is called
A) electron affinity.
B) ionization energy.
C) electronegativity.
D) hybridization.
E) London forces. - ✔✔C) electronegativity.
Avogadro's Law - ✔✔equal volumes of gases at the same temperature and
pressure contain equal numbers of molecules
Boyle's Law - ✔✔Boyle's Law states that at constant temperature and moles,
pressure and volume are inversely proportional.
Mathematically this is written as: PV = PV
Gay-Lussac's Law - ✔✔the pressure of a gas is directly proportional to the
Kelvin temperature if the volume is constant
Charles' Law - ✔✔the law that states that for a fixed amount of gas at a
constant pressure, the volume of the gas increases as the temperature of the gas
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