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WorksheetsFinal Part 1
Total questions: 50
Worksheet time: 25mins
What does the 101 in the image mean?
the number of neutrons
the mass number
the nuclide number
the atomic number
A foam is a colloidal dispersion of
a gas and a liquid
a solid and a liquid
two liquids
two solids
Which of the following does not detect radiation?
radioactive tracers
film badges
scintillation counters
Geiger-Müller counters
The Haber process for producing ammonia commercially is presented by the equation N2(g) + 3H2(g) → 2NH3(g). To completely convert 9.6 mol hydrogen gas to ammonia gas, how many moles of nitrogen gas are required?
3.2 mol
9.6 mol
6.4 mol
29 mol
A chemical equation is balanced when the
products and reactants are the same chemicals.
subscripts of the reactants equal the subscripts of the products.
coefficients of the reactans equal the coefficients of the products.
same number of each kind of atom appears in the reactants and in the products.
Which of the following processes always decreases the number of protons by an even number?
alpha decay
fission
beta decay
fusion
A nuclide is identified by
the number of neutrons in its nucleus.
the number of neutrons and protons in its nucleus.
the number of protons in its nucleus.
None of these are correct.
The triple point of a substance is the temperature and pressure conditions at which
states of substance coexist at equilibrium.
equilibrium cannot occur.
kinetic energy is at a minimum.
density is greatest.
If a gas with an odor is released in a room, it quickly can be detected across the room because it
is dense
is compressed
condenses
diffuses
In an equation, the symbol for a substance in water solution is followed by
(aq)
(l)
(g)
(s)
If a reaction system has come to equilibrium, it can be made to run to completion
only if the temperature is low enough.
by removing a product.
only if it is not reversible.
under no circumstances.
A decay series ends with
a fission reaction.
a parent nuclide.
a transuranium element.
a stable nuclide.
How is a Celsius temperature reading converted to a Kelvin temperature reading?
by adding 273.15
by multiplying by 273.15
by subtracting 273.15
by dividing by 273.15
A real gas
cannot be produced in scientific laboratories.
cannot by condensed.
does not obey all the assumptions of the kinetic-molecular theory.
consists of particles that do not occupy space.
Which expression defines specific heat?
Raising the temperature of reactants in a system
has no effect on the average kinetic energy of molecules.
decreases the average kinetic energy of the molecules.
increases the average kinetic energy of the molecules.
decreases the rate of collision of molecules.
A reaction in which products can react to re-form reactants is
impossible.
reversible.
reforming.
buffered.
The equation AX → A + X is the general equation for a
decomposition reaction.
single-displacement reaction.
combustion reaction.
synthesis reaction.
Which of the following affects reaction rate?
the nature of reactants
temperature
surface area of reactants
all of these will affect reaction rate
Which of the following would be investigated in reaction stoichiometry?
the types of bonds that break and form when acids react with metals
the masses of hydrogen and oxygen in water
the amount of energy released in chemical reactions
the mass of potassium required to produce a known mass of potassium chloride
Which of the following is not a net ionic equation?
Cu2+(aq) + S2-(aq) → CuS(s)
Fe2+(aq) + 2Cl-(aq) + 2OH-(aq) → Fe(OH)2(s) + 2Cl-(aq)
Ag+(aq) + Cl-(aq) → AgCl(s)
3Ca2+(aq) + 2P3-(aq) → Ca3P2(s)
What does the 218 in polonium-218 represent?
the mass defect
the atomic number
the neutron number
the mass number
A 12.4 g sample of material was heated from 23.2oC to 58.8oC. It absorbed 3821.4 J of energy as heat. What is the specific heat of this material?
-8.66 J/(g⋅oC)
0.0000911 J/g
110 J/(g⋅oC)
8.66 J/(g⋅oC)
Which of the following is the nuclear symbol for a beta particle?
What two processes are at equilibrium in a saturated sugar solution?
decomposition and synthesis
evaporation and condensation
dissolving and crystallization
ionization and recombination
What is the balanced equation for the combustion of sulfur?
S(s) + 2O2(g) → SO42-(aq)
S(s) + O2(g) → SO2(aq)
2S(s) + 3O2(g) → SO3(aq)
S(s) + O2(g) → SO(aq)
What is the half-life of an isotope if 125 g of a 500 g sample of the isotope remains after 3.0 years?
2.5 years
1.5 years
3.5 years
4.5 years
What is the molarity of a solution that contains 0.222 mol KCl in 7.85 L solution?
35.4 M
0.0283 M
8.07 M
1.74 M
In the equilibrium system CH3COOH(aq) + H2O(l) ↔ H3O+(aq) + CH3COO-(aq), which reaction preceeds more rapidly at equilibrium?
the reverse reaction
the forward reaction
both reactions stop
both reactions proceed at the same rate
Which attempts to explain chemical reactions and physical interactionf of molecules?
thermodynamics
thermochemistry
cheimcalkinetics
collision theory
Which of the illustrations below represents a fission reaction?
A 3.5 g sample of metal was heated from -5.8oC to 17.8oC. It absorbed 35.1 J of energy as heat. What is the specific heat of this piece of metal?
-0.42 J/(g⋅oC)
0.42 J/(g⋅oC)
237 J/(g⋅oC)
0.0042 J/(g⋅oC)
All of the following are heterogeneous mixtures except
whole wheat bread
granite
an oil-water mixture
tap water
To be effective, a collision requires
a favorable orientation
sufficient energy
a reaction mechanism
sufficient energy and a favorable orientation
Which of the equation below is an example of a thermochemical equation?
Mg(s) + 2H3O+(aq) + Cl-(aq) → Mg2+(aq) + 2Cl-(aq) + H2(g) + H2O(l)
2H2(g) + O2(g) + → H2O(l)
Mg + 2H3O+ + Cl- → Mg2+ + 2Cl- + H2 + H2O
2H2(g) + 2O2(g) + → H2O(l) + 483.6 kJ
What nuclides are produced when a nuclide decays?
decaying nuclides
daughter nuclides
son nuclides
radioactive nuclides
The reaction represented by the equation Mg(s) + 2HCl(aq) → H2(g) + MgCl2(aq) is a
composition reaction
decomposition reaction
single-displacement reaction
double-displacement reaction
Which of the following is a homogeneous mixture?
water
whole wheat bread
a sugar-water solution
sugar
Reactions that affect the nucleus of an atom are called
radioactive decays
nuclear reaction
fissions
fusions
The spontaneous disintegration of a nucleus into a slightly lighter and more stable nucleus, accompanied by emission of particles, electromagnetic radiation, or both, is
nuclear fission
radioactive decay
nuclear fusion
nuclear radiation
Which of the following is the heaviest nuclide of a decay series?
the last decaying nuclide
the last radioactive nuclide
the parent nuclide
the daughter nuclide
Which of the following burns most slowly?
small pieces of coal
powdered coal
a large lump of coal
All of these burn at the same rate.
For the reaction represented by the equation 2H2 + O2 → 2H2O, how many grams of water are produced from 4.56 mol of hydrogen?
82.2 g
164 g
41.1 g
0.253 g
In the equation 2Al(s) + 3Fe(NO3)2(aq) → 3Fe(s) + 2Al(NO3)3(aq), iron has been replaced by
nitrate
water
aluminum
nitrogen
Which mixture contains visible particles that settle out unless the mixture is stirred?
a homogeneous mixture
a colloid
a suspension
a solution
For the reaction represented by the equation C + 2H2 → CH4, how many moles of hydrogen are required to produce 11.6 mol of methane, CH4?
23.2 mol
11.6 mol
0.172 mol
5.80 mol
Predict the product of the reaction represented by the following equation:
MgO + CO2 →
MgCO3
MgCO2 + O
MgC + O3
Mg + CO3
The reaction represented by the equation Pb(NO3)2(aq) + 2KI(aq) → PbI2(s) + 2KNO3(aq) is a
double-displacement reaction
combustion reaction
synthesis reaction
decomposition reaction
Given the equation 3A + 2B → 2C, the starting mass of A, and its molar mass, and you are asked to determine the moles of C produced, your first step in solving the problem is the multiply the given mass of A by
What determines the average kinetic energy of the molecules of any gas?
pressure
molar mass
container volume
temperature
