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CHEM 100 Final
Terms in this set (103)
Ammonia, NH3, would be classified as which of the following?
Salt water would be classified as which of the following?
A heteroatomic molecule would be classifies as which of the following?
47 neutrons, 35 protons, 36 electrons
Which of the following set of particles represents an ion of net charge -1 and of mass number 82?
Carbon dioxide subliming would be classified as which of the following?
Iron's ability to rust in the presence of oxygen would be classified as which of the following?
Number of Protons
Each atom of a specific element has the same...
The number of neutrons in an atom of Ba-139 is:
How many electrons are in a CL-34 ion with a negative one charge?
Substance X has 13 protons, 14 neutrons, and 10 electrons. Determine its identity.
Alkaline earth metals
What is the name given to the family of elements in column 2A
The opposite charge and a smaller mass
Compared to the mass and charge of a proton an electron has...
Which element would you expect to be the best conductor of electricity?
Protons and neutrons
Which subatomic particle(s) is responsible for an atom's mass?
Protons and electrons
Which subatomic particle(s) carry a charge?
Isotopes differ in the amount of which subatomic particle?
An atom which has gained electrons is called a(n)....... and has a ...... charge.
Which of the following elements is a transition element?
Which of the following is a non-metal?
Protons possess a ... charge and have a mass of ....... amu.
The nucleus that results from the emission of a beta particle from the lead-214 nucleus
Radon-222 may emit an alpha particle to produce a daughter element. That daughter element may emit another alpha particle to produce
When an atom of sodium-22 releases a positron, the resulting atom becomes....
Uranium-235 is produced by the alpha decay of...
The electrons in the outermost shell
Which of these is the correct definition for valence electrons?
How many valence electrons does boron have?
Which of these does not have two valence electrons?
For main group elements, how does the number of valence electrons compare to their group number?
Group number is equal to number of valence electrons.
Which of the following would have the largest atomic radius?
Which of the following would have the largest ionization energy?
The half-life of tritium, a radioisotope of hydrogen, is 12.3 years. How long would it take the activity of a sample of tritium to drop to one-fourth its original value?
The shape of a typical p orbital is
hourglass or dumbbell
The ground state electron configuration of calcium is
1s2 2s2 2p6 3s2 3p6 4s2
Which of the following elements has the ground state electron configuration 1s22s22p63s23p64s23d104p3?
Which of the following processes has no effect on the mass number of the radionuclide?
Which of the following subshells can hold ten electrons?
how many orbitals are in a p subshell
A neuron rich radioisotope will decay by what process?
A neutron poor radioisotope will decay by what process?
A heavy radioisotope (Z>83) will decay by what process?
A calcium atom tends to...... and form a ....
lose electrons, 2+ ion
A chlorine atom tends to... and form a....
gain 1 electron, 1- ion
what type of bond occurs between calcium and oxygen?
what type of bond occurs between hydrogen and chlorine?
what type of bond occurs between a metal and a nonmetal?
what is the formula of a compound made between barium and chlorine?
What is the formula made between potassium and nitrogen?
What is the formula of a compound made between magnesium and phosphorus
What type of bonding involves the transfer of electrons?
what type of bonding involves the unequal sharing of a pair of electrons?
polar covalent bonding
aluminum and sulfur form an ionic compound with the formula.....
Which of the following compounds is ionic?
which of the following compounds is ionic?
Look at the list below that shows names of chemical substances paired with their formulas. Select the incorrect pair...
calcium dioxide, CaO2
Titanium(IV) oxide is
The salt CaCO3 is correctly named
what is the formula for the compound silicon dioxide?
The correct name of N2O4 is....
the correct name of OCl2 is..
how many valence electrons are in a molecule of H2CO
How many valence electrons are in the polyatomic ion, SO42-
how many bonds are in a molecule of H2CO?
How many nonbonding electrons are located in a molecule of H2CO?
What is the octet number of electrons for a molecule of H2CO?
How many bonds exist in a molecule of H2CO?
How many bonding electrons are in the polyatomic ion, SO42-
How many nonbonding electrons are in the polyatomic ion, SO42-?
How many bonds does the polyatomic ion, SO42-, contain?
What is the octet number for the polyatomic ion, SO42-?
The molecule formaldehyde, H2CO, has the geometric shape of...
the shape of a water molecule is
a water molecule ca exhibit......
all the above
dipole-dipole attractions are intermolecular forces that hold....... together
non-polar molecules exhibit
if a central atom is bonded to 3 chlorine atoms and has a tetrahedral electron geometry, is the molecule polar?
If a central atom is bonded to 3 chlorine atoms and has a trigonal planar electron geometry, is the molecule polar?
if a central atom is bonded to 2 chlorine atoms and has a trigonal planar electron geometry, is the molecule polar?
In the following chemical reaction, the Ca(OH)2 is considered a _______________. Ca(OH)2 (s) + CO2 (g) → CaCO3 (s) + H2O (l)
The following reaction is not balanced because __________________________.
AgNO3 (aq) + Cu (s) → Cu(NO3)2 (aq) + Ag (s)
there is not enough nitrogen on the left
To correctly balance the following equation for the combustion of ethanol, you need __________ for every mole of ethanol, C2H6O.
___ C2H6O (l) + ___ O2 (g) →___ CO2 (g) + ___ H2O (l)
three moles of oxygen molecules
Select the correctly balanced chemical equation from those listed below.
3 H2 + N2 → 2 NH3
Using the atomic masses of potassium, chromium, and oxygen, the formula mass of potassium dichromate (K2Cr2O7) is calculated to be __________.
2(39.1 amu) + 2(52.0 amu) + 7(16.0 amu) = 294.2 amu
The formula mass of sodium carbonate is
The formula mass of glucose (C6H12O6) is
In the following reaction, how many moles of aluminum are required to form 0.50
moles of Al2O3?
2 Al (s) + Fe2O3 (s) → 2 Fe (l) + Al2O3 (s)
In the following reaction, how many grams of iron will be produced from 26.98 grams of aluminum?
2Al (s) + Fe2O3 (s) →2 Fe (l) + Al2O3 (s)
When you apply an ice pack to your knee, heat flows out from your knee and into the ice pack. The process of melting ice is ________________.
The change in heat content for an exothermic reaction is negative because the products' chemical bonds have
more energy then the reactants' chemical bonds
Using the following bond energies, find the change in heat during the formation of two moles of HBr.
H2 + Br2 → 2 HBrH-H 432 kJ/mol Br-Br 190 kJ/mol H-Br 362 kJ/mol
Using the following bond energies, find the energy released during the formation of two moles of ammonia.
N2 + 3 H2 → 2 NH3H-H 432 kJ/mol N≡N 943 kJ/mol H-N 390 kJ/mol
for two molecules to react they must
increasing the concentrations of reactants increases the rate of reaction because
reactants collide more frequently
all the following affect the rate of a chemical reaction except
whether the reaction is endothermic or exothermic
all of the following statements concerning acids are true except
the pH of an acidic solution is greater than 7
dissociate completely in water
only react partially with water
which of the following reactions describes ionization of nitric acid, a strong acid?
HNO3 (aq) + H2O (l) → H3O+ (aq) + NO3- (aq)
which of the following will produce an acid when added to water?
nonmetal oxides react with water to produce
bases in general
all of these
strong bases in water
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