WorksheetsKendrew's amazing attempt at passing Mrs.taylors final grade.
Total questions: 116
Worksheet time: 58mins
What are shared in a covalent bond?
ions
electrons
lewis structures
dipoles
VSEPR theory is a model for predicting
strength of metallic bonds
lattice energy values
the shape of molecules
ionization energy
The ions in most ionic compounds are organized into a
crystal
A mutual attraction between nuclei and valence electrons between different atoms is
Chemical bond
If the lattice energy of compound A is lesser than that of compound B,
After drawing a Lewis structure, one should
confirm that the total number of valence electrons used equal to number available
In metallic bonds, the mobile electrons surrounding the positive ions are called a(n)
sea of electrons
The electrons available to be lost, gained, or shared when atoms form compounds are called
Malleability and ductility are characteristic of substances with
metallic bonds
Chemical bonds
physical bonds
Ionic bonds
A negative ion is called
The geometry shape of AB₃ molecule is
A formula that shows only the types and numbers of atoms combined in a single molecule is
molecular formula
The geometry shape of AB₃E molecule is
If the atoms that share electrons have an unequal attraction for the electrons, the bond is called
If a material can be shaped or extended by physical pressure, such as hammering, which property does the material have?
The pair of elements that forms a bond with the most ionic character is
Na and Cl
The shape of a methane molecule, CH₄ is
The shape of H₂O is
Bent
The shape of an AB₆ molecule is
The participation of reactants in a chemical reaction is restricted by the
limiting reactant.
The chemical coefficients in a chemical equation represent the
Relative numbers of moles of reactants and products.
For the reaction represented by the equation 2H₂ + O₂ → 2H₂O, how many grams of water are produced from 6.00 mol of hydrogen?
108 grams
What is the study of the mass relationships among reactants and products in a chemical reaction?
Reaction stoichiometry
For a chemical reaction, percentage yield represents the
efficiency
temperature
time
amount of reactants
A chemical reaction involving substances A and B stops when B is completely used. A is the
If the percentage yield for a chemical reaction is 80.0%, the
actual yield is 80.0 g for every theoretical yield of 100. g.
theoretical yield is 80.0 g for every actual yield of 100. g.
actual yield is 80 times as much as the theoretical yield.
theoretical yield is 80 times as much as the actual yield.
To determine the limiting reactant in a chemical reaction involving known masses of the two reactants, which of the following would be most useful?
calculating the mass of a single product formed from each reactant
A determination of the masses and number of moles of sulfur and oxygen in the compound sulfur dioxide would be studied in
Reaction stoichiometry
Composition stoichiometry
Chemical equilibrium
Chemical kinetics
For the reaction represented by the equation AgNO₃ + NaCl → NaNO₃ + AgCl, how many moles of silver chloride, AgCl, are produced from 7.0 mol of silver nitrate AgNO₃?
For the equation P₄(s) + 5O₂(g) → P₄O₁₀(s), if phosphorus reacts with 10 mol of oxygen, the theoretical yield of P₄O₁₀ in moles will be
2
What is the study of mass relationships of elements in compounds?
Composition stoichiometry
Fewer steps are required to solve stoichiometry problems when
the reactant is given in moles and the product is sought in moles.
Actual yield must be determined by
estimation.
theoretical yield.
calculations.
experiments
Each of the four types of reaction stoichiometry problems requires using a
Mole ratio.
What branch in chemistry deals with the mass relationships of elements in compounds and the mass relationships among reactants and products in chemical reactions?
What is the ratio of the actual yield to the theoretical yield, multiplied by 100%?
mole ratio
Avogadro yield
percentage yield
excess yield
Which of the following would not be studied in the branch of chemistry called stoichiometry?
The amount of energy required to break the ionic bonds in calcium fluoride
How many mole ratios can be correctly obtained from the chemical equation 2Al₂O₃(l) → 4Al(s) + 3O₂(g)
6
In the equation 2Al₂O₃ → 4Al + 3O₂, what is the mole ratio of oxygen to aluminum?
The molar mass of an element is the mass of one
mole of that element
Name SiO₂ .
A compound’s empirical formula is N₂O₅, what is the molecular formula?
N₄O₁₀
What is the formula for zinc (II) fluoride?
The empirical formula for a compound shows the symbols of the elements with subscripts indicating the
Smallest whole-number ratio of the atoms.
What is the percentage composition of CF₄ ?
13.6% C, 86.4% F
20% C, 80% F
16.8% C, 83.2% F
81% C, 19% F
A formula that shows the simplest whole-number ratio of the atoms in a compound is the
What is the formula for a compound between calcium ions and chloride ions?
What is the name of the following compound: NaCl ?
A chemical formula that shows the actual number and kinds of atoms present in one molecule of a compound is called_________
What is the name of the following compound: CO?
The molar mass of MgBr₂ is
the sum of the masses of 1 mol of Mg and 2 mol of Br
the sum of the masses of 1 atom of Mg and 2 atoms of Br
the sum of the masses of 1 mol of Mg and 1 mol of Br
the sum of the masses of 1 atom of Mg and 1 atom of Br
What is the name of the following compound: LiNO₃?
What is the percentage composition of CO?
43% C, 57% O
Which of the following is an empirical formula?
CH₂O
What is the molar mass of magnesium chloride, MgCl₂ ?
How many atoms of fluorine are present in a molecule of carbon tetrafluoride, CF₄?
What is the formula for diphosphorus pentoxide?
P₂O₅
Name Al₂S₃.
Aluminum sulfate
What is the name of the following compound: IF₇?
The formation of an aqueous product in a chemical reaction is represented by the symbol
Which coefficients correctly balance the formula equation below?
KClO₃ (s)→ KCl(s) + O₂ (g)
A chemical equation is balanced when the
Which of the following indicates that a chemical equation is balanced?
To balance a chemical equation, you must
Adjust the coefficients
In which type of reaction do two or more compounds react to form one product?
The equation AX → A + X is the general equation for a
From a complete and correctly written chemical equation, you can obtain the
chemical formulas of the reactants and products.
relative amounts of the reactants and products.
physical states of the reactants and products.
All of the answers
Which of the following equations represents the balanced equation for the reaction of iron and oxygen?
Which equation below violates the law of conservation of mass?
KCl + Br → KBr + Cl₂
The equation AX + BY → AY + BX is the general equation for a
Decomposition reaction
Synthesis reaction
Double-displacement reaction
Single-displacement reaction
Which of the following is true regarding single-displacement reactions?
When a solid produced by a chemical reaction separates from the solution it is called
a precipitation
What type of chemical reaction does the following chemical equation represent?
2HCl(aq) + Cr(s) → H₂ (g) + CrCl₂ (aq)
You mix solution A with solution B in a beaker. Which of the following observations does not help you prove that a chemical reaction has occurred?
The beaker becomes warm.
You see gas bubble out of solution.
Solution A and solution B when mixed turn yellow.
None of the above; all help prove that a chemical reaction has occurred.
When a binary compound decomposes, what is produced?
2 elements
A chemical formula written over the arrow in a chemical equation signifies
In the chemical equation 2Mg(s) + O₂ (g) → 2MgO(s),
Mg represents the product magnesium.
the reaction yields magnesium.
Mg represents the reactant magnesium.
O2 represents the product oxygen gas.
In the expression 3CO₂ , the numbers 3 and 2 are, respectively,
a subscript and a coefficient.
two subscripts.
a coefficient and a subscript.
two coefficients.
What type of chemical reaction is represented by the following word equation? iron + oxygen →iron(II) oxide
The participation of reactants in a chemical reaction is restricted by the
limiting reactant
The chemical coefficients in a chemical equation represent the
Relative numbers of moles of reactants and products.
For the reaction represented by the equation 2H₂ + O₂ → 2H₂O, how many grams of water are produced from 6.00 mol of hydrogen?
108 grams
36 grams
54 grams
72 grams
What is the study of the mass relationships among reactants and products in a chemical reaction?
Reaction stoichiometry
For a chemical reaction, percentage yield represents the
amount
time
temperature
efficiency
A chemical reaction involving substances A and B stops when B is completely used. A is the
Primary product
Primary reactant
Limiting reactant
Excess reactant
If the percentage yield for a chemical reaction is 80.0%, the
To determine the limiting reactant in a chemical reaction involving known masses of the two reactants, which of the following would be most useful?
calculating the mass of a single product formed from each reactant
A determination of the masses and number of moles of sulfur and oxygen in the compound sulfur dioxide would be studied in
Composition stoichiometry
For the reaction represented by the equation AgNO₃ + NaCl → NaNO₃ + AgCl, how many moles of silver chloride, AgCl, are produced from 7.0 mol of silver nitrate AgNO₃?
For the equation P₄(s) + 5O₂(g) → P₄O₁₀(s), if phosphorus reacts with 10 mol of oxygen, the theoretical yield of P₄O₁₀ in moles will be
What is the study of mass relationships of elements in compounds?
Composition stoichiometry
Fewer steps are required to solve stoichiometry problems when
the reactant is given in moles and the product is sought in moles.
Actual yield must be determined by
experiments.
Each of the four types of reaction stoichiometry problems requires using a
Mole ratio.
vWhat branch in chemistry deals with the mass relationships of elements in compounds and the mass relationships among reactants and products in chemical reactions?
What is the ratio of the actual yield to the theoretical yield, multiplied by 100%?
mole ratio
Avogadro yield
excess yield
percentage yield
Which of the following would not be studied in the branch of chemistry called stoichiometry?
The amount of energy required to break the ionic bonds in calcium fluoride
How many mole ratios can be correctly obtained from the chemical equation 2Al₂O₃(l) → 4Al(s) + 3O₂(g)
6
In the equation 2Al₂O₃ → 4Al + 3O₂, what is the mole ratio of oxygen to aluminum?
Which of the following causes particles in a liquid to escape into a gas state?
high kinetic energy
According to the kinetic molecular theory, particles of matter
What is the process by which molecules of a gas randomly encounter and pass through a small opening in a container?
Which of the following properties do solids share with liquids?
An ideal gas is a hypothetical gas
that conforms to all of the assumptions of the kinetic theory.
Which is an example of gas diffusion?
the odor of perfume spreading throughout a room
Which is an example of effusion?
Air slowly escaping from a pinhole in a tire
The triple point of a substance is the temperature and pressure conditions at which
states of a substance coexist at equilibrium.
Which of the following is a crystalline solid?
Iron
Water
Sugar
a quartz rock
What determines the average kinetic energy of the molecule of any gas?
By which process do gases take the shape of their container?
expansion
A real gas
does not obey all the assumptions of the kinetic-molecular theory.
Particles within a solid
vibrate about fixed positions.
The compressibility of a liquid is generally
zero
equal to that of a gas.
more than that of a gas.
less than that of a gas.
What is the process of a substance changing from a solid to a vapor without passing through the liquid phase?
The kinetic-molecular theory explains the behavior of
all the above
Why does the air pressure inside the tires of a car increase when the car is driven?
The air particles inside the tire increase their speed because their temperature rises.
