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The number of valence electrons found in an atom of a Group A element is equal to
its group number
-
Valence electrons are located
in the outermost energy level of an atom
-
In an electron-dot structure of an element, the dots are used to represent
the valence electrons
-
How many valence electrons are in the electron-dot structures for the elements in group 3A?
3
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How many electrons will aluminum gain or lose when it forms an ion?
lose 3
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How many electrons will chlorine gain or lose when it forms an ion?
gain 1
-
The compound MgCl2 is named
magnesium chloride
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In a molecule with covalent bonding
atoms are held together by sharing electrons
-
In a covalently bonded molecule, the number of electrons that an atom shares with others is usually equal to the the number of electrons
needed to give it a noble gas arrangement
-
The correct name for the compound N2O3 is
dinitrogen trioxide
-
What is the formula of carbon tetraiodide?
CI4
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The ability of an atom to attract the shared electrons in a covalent bond is its
electronegativity
-
The name of Al2(SO4)3 is
aluminum sulfate
-
Ionic bonding is expected in which of these compounds?
KF
-
Which one of the following is a characteristic of a base?
has a slippery, soapy feel
-
The correct formula for sulfuric acid is
H2SO4
-
The name of Al(OH)3 is
aluminum hydroxide
-
Which of these statements correctly describes the hydronium-hydroxide balance in the given solution?
In bases, [OH-] is greater than [H3O+]
-
For Kw, the product of [H3O+] and [OH-] is
1 X 10-14
-
What is the [H3O+] in a solution with [OH-]= 1 x 10-12M?
1X10-2M
-
What is the [OH-] in a solution that has a {H3O+] = 1X10-6M?
1X10-8M
-
Which of the following is correctly identified?
NaOH, strong base
-
Ammonium hydroxide is a weak base because
it dissociates only slightly in water
-
The function of a buffer is to
maintain the pH of a solution
-
The normal blood pH is about
7.4
-
What is the name of the medical condition of an asthmatic patient with a blood pH of 7.30?
respiratory acidosis
-
If a condition of hypoventilation occurs, the blood pH of the patient is expected to
decrease
-
When hyperventilation (rapid breathing) causes a patient to exhale large amounts of CO2, the blood pH rises in a condition called
respiratory acidosis
-
Which of the following is a neutralization reaction?
HNO3 + KOH -> H2O + KNO3
-
Which of the following is NOT part of the kinetic theory of gases?
there is very little empty space in gas
-
According to the kinetic theory of gases, particles of a gas
are very far apart
-
The force of gas particles against the walls of a container is called
pressure
-
The unit of 1 atmosphere used to describe the pressure of a gas is equal to
760 mm Hg
-
A 5.00-L tank contains helium gas at 1.50 atm. What is the pressure of the gas in mm Hg?
1140 mm Hg
-
In response to Boyle's law, the pressure of a gas increases as the volume decreases because
the gas particles strike the walls of the container more often
-
Which of the following correctly describes the process of inspiration (air entering the lungs)?
the lungs expand, causing their internal pressure to decrease
-
The volume of a gas with a pressure of 1.2 atm increases from 1.0 L to 4.0 L. What is the final pressure of the gas, assuming constant temperature?
0.30 atm
-
[ballon diagram]
The balloon is put into a chamber whose pressure is less than the atmospheric pressure.
C; big balloon
-
[balloon diagram]
The temperature is changed from 50*C to -150*C at constant pressure.
A; smallest balloon
-
Complete the following statement: In Charles' law, the volume of a gas ____ when the ____ decreases.
decreases, temperature
-
A diver exhales a bubble with a volume of 250 mL at a pressure of 2.4 atm and a temperature of 15*C. What is the volume of the bubble when it reaches the surface where the pressure is 1.0 atm and the temperature is 27*C?
630 mL
-
Which of the following correctly describes the partial pressures of gases in the body?
high O2, low CO2, oxygenated blood
-
A gas sample in a closed, expandable container of initial volume 5.00 L was allowed to warm from 25*C to 35*C. What was its new volume?
5.17 L
-
In a solution, the solvent
can be a solid, liquid, or gas
-
A solution is prepared by dissolving 2 g of KCl in 100 g of H2O. In this solution, H2O is the
SOLVENT
-
Oil does not dissolve in water because
oil is nonpolar
-
In water, a substance that ionizes completely in solution is called a
strong electrolyte
-
An equivalent is
the amount of ion that carries 1 mole of electrical charge
-
The mass/mass percent concentration refers to
frams of solute in 100 g of solution
-
What is the concentration, in m/m% of a solution prepared from 50.0g NaCl and 150.0g of water?
25.0%
-
Rubbing alcohol is 70% isopropyl alcohol by volume. How many mL of isopropyl alcohol are in a pint (473 mL) container?
330 mL
-
In the process known as osmosis, ___ moves through a semipermeable membrane into an area of ______ concentration.
solvent, lowersolvent
-
A solution with the same osmotic pressure as the blood is
isotonic to the blood
-
A solution that has an osmotic pressure less than that of red blood cells is called
hypotonic
-
A red blood cell will undergo crenation in
7% NaCl
-
Which solution is isotonic to a red blood cell?
0.9% NaCl
-
A red blood cell will undergo hemolysis in
water
-
What volume of 0.10M NaOH can be prepared from 250 mL of 0.30 M NaOH
0.75 L
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