05 SmartBook Reading
Select all that apply Which of the following Lewis dot symbols correctly represent each element? Select all that apply. (a) B (b) Si (c) S (d) P (e) H
(a) (c) (e)
Which of the following Lewis dot symbols correctly represent each element? Select all that apply. (a) (b) (c) (d) (e)
(a) (c) (e)
Select all that apply Which of the following Lewis dot symbols correctly represent each element? Multiple select question. (a) O (b) C (c) Cl (d) Ca (e) N
(b) C (c) Cl (e) N
Which of the following statements correctly describe compounds? Select all that apply.
- A compound contains a fixed number of atoms in its formula. - A compound is a pure substance. - A compound has a fixed mass ratio of its components.
What is the mass percent of oxygen in aluminum oxide (Al2O3)?
47.08%
Which of the following equations will give the correct formula mass of the compound Fe(ClO4)2?
55.85 + 2(35.45) + 8(16.00)
Match each compound with the correct mass % of hydrogen (H). C6H6 <--------> CH3OH <--------> CH2O <-------->
7.74% 12.6% 6.71%
How many grams of KMnO4 correspond to 3.13 × 1022 formula units of KMnO4? Avogadro's number is 6.022 × 1023.
8.21 g of KMnO4
Which of the following statements correctly describe compounds? Select all that apply. A) A compound has a fixed mass ratio of its components. B) The components of a compound can be separated physically. C) The properties of a compound are the same as the properties of its component elements. D) A compound is a pure substance. E) A compound contains a fixed number of atoms in its formula.
A compound has a fixed mass ratio of its components. A compound is a pure substance. A compound contains a fixed number of atoms in its formula.
Formula and molecular masses are calculated using the chemical [Blank 1] of the relevant compound, and the atomic masses obtained from the [Blank 2] table. The [Blank 3] of the atomic masses in the correct proportions gives the formula or molecular mass of the compound.
Blank 1: formula or composition Blank 2: periodic Blank 3: sum, addition, total, summation, total mass, or adding
An ionic compound consists of a three-dimensional array of cations and anions called a(n) [Blank].
Blank 1: lattice or crystal lattice
The [Blank 1][Blank 2]of a substance is the mass per mole of a substance, in units of g/m
Blank 1: molar or molecular Blank 2: mass
The [Blank 1] formula shows the exact number of atoms of each element in one molecule of compound.
Blank 1: molecular
The compound MgS is correctly named magnesium [Blank 1].
Blank 1: sulfide
A compound consists of atoms of [Blank 1] or more different [Blank 2] that are chemically bonded together.
Blank 1: two or 2 Blank 2: elements
A Lewis dot symbol consists of an element's symbol, surrounded by dots that represents its [Blank] electrons.
Blank : Valence or Outer shell
A particular hydrocarbon (a compound consisting only of C and H) contains 14.4% H by mass. If the molar mass of the compound is 85. ± 2 g/mol, what is the molecular formula?
C6H12
Which of the following compounds are organic? Select all that apply. A) NaBr B) C7H16 C) PCl5 D) C2H6O E) CO2
C7H16 C2H6O
Which of the following formulas for ionic compounds are correct? Select all that apply. A) CaO B) Na2S C) Mg2O D) Ca3N2 E) AgCl2
CaO Na2S Ca3N2
The compound Cu2O is correctly named ______.
Copper (I) oxide
Which of the following options are correct names for ionic compounds? Select all that apply. A) Copper(II) oxide B) Sodium(I) bromide C) Chromium sulfide D) Potassium chloride E) Calcium difluoride
Copper(II) oxide Potassium chloride
Match the appropriate representation with the structural, molecular, or empirical formula for butane (C4H10). Structural formula <----------------> Structural formula <----------------> Empirical formula <---------------->
H H H H H- C C C C H H H H H C4H10 C2H5
Which of the following compounds has the largest molar mass? A) H2SO4 B) C6H6 C) CH2Cl2 D) SO2
H2SO4
Which of the following acids is named correctly as an acid?
HBr: hydrobromic acid
The bond formed between two nonmetals, which are usually very similar in their tendency to lose or gain electrons, is a(n) _____ bond. This bond involves the _____ of one or more electron pairs between the two atoms.
covalent, sharing
The amount of energy required to separate 1 mole of ions in a crystalline solid into separate gaseous ions is called _____ energy. This energy provides a measure of the strength of a(n) _____ bond, since the stronger the bond, the _____ the amount of energy required to break it.
lattice; ionic; greater
What is the correct name of the ionic compound Li3N?
lithium nitride
Which one of the following options gives the correct procedure to calculate the number of moles of a substance given the mass of a sample?
mass / molar mass
Which one of the following options gives the correct procedure to calculate the mass of a substance given the number of moles?
moles × molar mass
Which of the following is the correct name for the molecular compound NO2?
nitrogen dioxide
A unit that contains two or more atoms covalently bonded together but that has an overall charge is called a(n) _____ ion. Many _____ compounds contain such units.
polyatomic; ionic
Which of the following statements correctly describe the structure of an ionic compound? Select all that apply. A) An ionic compound consists of a three-dimensional array of cations and anions. B) Each cation in the compound is associated with a particular anion. C) All ionic compounds have the same spatial arrangement of cations and anions. D) The ratio of cations to anions is such that the compound is electrically neutral overall. E) The three-dimensional arrangement of cations and anions is called a lattice.
- An ionic compound consists of a three-dimensional array of cations and anions. - The ratio of cations to anions is such that the compound is electrically neutral overall. - The three-dimensional arrangement of cations and anions is called a lattice.
Which of the following statements correctly describe ionic bonding? Select all that apply. A) Positive and negative ions combine in individual units of two or three ions each. B) Ionic bonding is typically observed when two nonmetals bond. C) Ionic bonding involves the transfer of electrons from the metal to the nonmetal. D) An ionic bond is the electrostatic attraction between two oppositely charged ions.
- Ionic bonding involves the transfer of electrons from the metal to the nonmetal. - An ionic bond is the electrostatic attraction between two oppositely charged ions.
Match each type of ion with the statement that correctly describes how to determine its charge using the periodic table. main-group cations <------------> anions <------------>
- The ion charge equals the group number. - The ion charge is calculated by subtracting 8 from the last digit of the group number.
Consider the formation of an ionic bond between the elements potassium (K) and chlorine (Cl). Which of the following statements describe this process correctly? Select all that apply.
- Total number of electrons lost equals the total number of electrons gained - K loses one electron from its 4s orbital to form a K+ cation - Both the K+ and Cl- ions have full outer shells containing 8 electrons
The formula mass of K2CO3 is equal to _____.
138.21 amu
Correctly associate each molar mass with its compound. CCl4 <--------> CH2O <--------> SF6 <--------> KrF2 <-------->
153.8 g/mol 30.03 g/mol 146.1 g/mol 121.8 g/mol
Which of the following combinations will result in an ionic compound with a balanced number of positive and negative charges? Select all that apply. A) 2 Li+ and S2- B) Mg2+ and Cl- C) Na+ and Br- D) K+ and O2- E) Ca2+ and 2 F-
2 Li+ and S2- Na+ and Br- Ca2+ and 2 F-
Calculate the correct number of moles AND formula units in 7.3 x 10-3 g of CaSO4. Avogadro's number is 6.022 × 1023.
3.2 × 1019 formula units of CaSO4 5.4 × 10-5 moles of CaSO4
Give the name of the ion most commonly formed by each of the following elements: Fluorine forms the [Blank 1] ion. Chlorine forms the [Blank 2] ion.
Blank 1: fluoride Blank 2: chloride
Which of the following statements correctly describe the general characteristics of a covalent bond? Select all that apply. A) A covalent bond involves the sharing of electrons between two atoms. B) The covalent bond involves the attraction between the nucleus of each atom and the electrons of the other. C) A covalent bond is typically observed when a metal bonds with a nonmetal. D) Electrons shared between the atoms are delocalized in an electron sea.
A covalent bond involves the sharing of electrons between two atoms. The covalent bond involves the attraction between the nucleus of each atom and the electrons of the other.
Which of the following statements correctly defines a molecule?
A molecule is an independent structure consisting of two or more atoms chemically bonded together.
Which of the following statements correctly describe how to name acids? Select all that apply. A) If the compound HCl is named as an acid, it would be called hydrogen chloride. B) Binary acids are named using the prefix hydro-. C) The name of a binary acid contains the nonmetal root with the suffix -ic. D) The name of a binary acid begins with the name of the nonmetal it contains.
Binary acids are named using the prefix hydro-. The name of a binary acid contains the nonmetal root with the suffix -ic.
The correct formula for the compound dichloride pentoxide is Cl [Blank 1] O [Blank 2]. Enter your answer in the correct format.
Blank 1: 2 Blank 2: 5
when the elements Mg and Cl form an ionic bond, Mg loses [Blank 1] electron(s) from the 3s orbital to form the Mg2+ cation. Cl gains [Blank 2] electron(s) in the 3p orbital to form the Cl- anion. since the total number of electrons lost always equals the total number of electrons gained, the compound formed will contain [Blank 3] Mg2+ ion(s) for every [Blank 4] Cl- ion(s)
Blank 1: 2 or two Blank 2: 1 or one Blank 3: 1 or one Blank 4: 2 or two
The molecular formula of a compound having an empirical formula NH2 (ℳ = 32.05 g/mol) is N [Blank 1] H [Blank 2] .
Blank 1: 2 or two Blank 2: 4 or four
Give the common name for each of the following molecular compounds. NH3 is [Blank 1] and H2O is [Blank 2].
Blank 1: ammonia Blank 2: water
When naming a molecular compound, the number of [Blank 1] of each element is indicated by a Greek numerical prefix. The first element in the name is numbered only when more than [Blank 2] atom of that element is present.
Blank 1: atoms Blank 2: one or 1
A molecule is an independent structure composed of two or more atoms chemically [Blank 1] together. A molecule composed of two atoms of the same element is called a(n) [Blank 2] molecule.
Blank 1: bonded, combined, or bound Blank 2: diatomic
Alkanes are organic compounds that contain the elements [Blank 1] and [Blank 2].
Blank 1: carbon or C Blank 2: hydrogen or H
Which of the following statements correctly describe the format used to represent an ionic compound? Select all that apply. A) In the formula of an ionic compound the cation is always placed first. B) Charges must be specifically written in the formula for an ionic compound. C) Subscripts in the formula for an ionic compound are always reduced to the simplest ratio. D) The number of atoms/ions in the formula is indicated by a subscript. E) A subscript refers to the element following it.
In the formula of an ionic compound the cation is always placed first. Subscripts in the formula for an ionic compound are always reduced to the simplest ratio. The number of atoms/ions in the formula is indicated by a subscript.
Which of the following options correctly describe lattice energy? Select all that apply. A) Lattice energy provides a measure of the strength of an ionic bond. B) Lattice energy is the energy required to force gaseous ions together to form 1 mol of an ionic solid. C) Lattice energy is the energy required to separate 1 mol of an ionic solid into gaseous ions. D) Lattice energy decreases as the attraction between the ions increases. E) Lattice energy is the energy required to arrange the ions of an ionic solid in a regular lattice.
Lattice energy provides a measure of the strength of an ionic bond. Lattice energy is the energy required to separate 1 mol of an ionic solid into gaseous ions.
An elemental symbol surrounded by dots that represent that atom's valence electrons is known as a(n) _____.
Lewis dot symbol
A covalent bond involves the sharing of electrons between two atoms. The covalent bond involves the attraction between the nucleus of each atom and the electrons of the other. A) Mg2+ and Cl- B) Na+ and Br- C) Ca2+ and 2 F- D) 2 Li+ and S2- E) K+ and O2-
Na+ and Br- Ca2+ and 2 F- 2 Li+ and S2-
Match the name for each polyatomic ion with its correct formula. Sulfate <--------> Sulfite <--------> Permanganate <--------> Carbonate <-------->
SO42- SO32- MnO4- CO32-
Which of the following statements correctly describe a molecular formula? Select all that apply. A) Subscripts in the molecular formula indicate the number of atoms of each element present in a molecule of the compound. B) The molecular formula is the simplest whole number ratio of elements in a molecule. C) The formula NaCl is an example of a molecular formula. D) The molecular formula CH4 represents a molecule that contains 1 carbon atom and 4 hydrogen atoms.
Subscripts in the molecular formula indicate the number of atoms of each element present in a molecule of the compound. The molecular formula CH4 represents a molecule that contains 1 carbon atom and 4 hydrogen atoms.
Select all that apply Which of the following statements correctly describe how to calculate a molecular or formula mass for a compound? (Recall that a subscript of "1" is assumed) A) In a formula such as N2O, the atomic masses of both elements should be multiplied by 2. B)The atomic mass of a cation or anion is the same as the mass of the neutral element. C) In a formula such as Ca(NO3)2, all subscripts of atoms in parentheses must be multiplied by 2. D) The formula/molecular mass is derived from the sum of the masses of all atoms of the component elements.
The atomic mass of a cation or anion is the same as the mass of the neutral element. In a formula such as Ca(NO3)2, all subscripts of atoms in parentheses must be multiplied by 2. The formula/molecular mass is derived from the sum of the masses of all atoms of the component elements.
Consider the formula for the ionic compound Na2O. Which of the following statements correctly interpret this formula? Select all that apply. A) The subscript 2 refers to the number of O atoms/ions in the formula. B) The cation in this compound is Na+. C) The compound consists of Na2O molecules. D) The compound contains 2 Na+ ions for every O2- ion. E) Charges are not included because they have been neutralized.
The cation in this compound is Na+. The compound contains 2 Na+ ions for every O2- ion.
Which of the following statements correctly describe how to determine the charge of a monatomic ion using the periodic table? Select all that apply. A) The charge of most transition metal cations cannot readily be predicted from the periodic table. B) Elements that form cations in Groups 1 and 2 form ions with a charge equal to the group number. C) Most elements in Groups 14 to 17 will form an ion with a charge equal to (group number + 18). D) Zn always forms the Zn2+ ion.
The charge of most transition metal cations cannot readily be predicted from the periodic table. Elements that form cations in Groups 1 and 2 form ions with a charge equal to the group number. Zn always forms the Zn2+ ion.
Which of the following options correctly describe a polyatomic ion? Select all that apply. A) All polyatomic ions are negatively charged. B)Polyatomic ions are found in molecular compounds. C) A polyatomic ion always contains two or more different elements. D) The charge on a polyatomic ion belongs to the whole unit. E) The atoms of a polyatomic ion are held together by covalent bonds.
The charge on a polyatomic ion belongs to the whole unit. The atoms of a polyatomic ion are held together by covalent bonds.
Which of the following statements are part of the proper calculation of the mass % of O in acetic acid (CH3COOH)? Select all that apply. A) The mass of oxygen atoms in a mole of acetic acid is 32.00 g. B) % O = 26.64% C) % O = 53.29% D) The molar mass of acetic acid is 60.05 g/mol. E) The molar mass of acetic acid is 31.03 g/mol.
The mass of oxygen atoms in a mole of acetic acid is 32.00 g. % O = 53.29% The molar mass of acetic acid is 60.05 g/mol.
Select all the pieces of information that are necessary to calculate the mass % of an element in a given compound. A) The molecular or formula mass of the compound B) The number of atoms of the element in a molecule or formula unit of the compound C) The mass of a given sample of the compound D) The formula of the compound
The molecular or formula mass of the compound The number of atoms of the element in a molecule or formula unit of the compound The formula of the compound
Which of the following statements correctly describe how to name a binary molecular compound? Select all that apply. A) The element with the higher group number is first in the formula and name. B) If only one atom of an element is present, the prefix mono- is always used. C) The name of the first element remains unchanged, except for the addition of a prefix where appropriate. D) A Greek numerical prefix is used to indicate the number of atoms of each element in the compound. E) The second element is named with its root and the suffix -ide.
The name of the first element remains unchanged, except for the addition of a prefix where appropriate. A Greek numerical prefix is used to indicate the number of atoms of each element in the compound. The second element is named with its root and the suffix -ide.
Which of the following statements correctly describe molar mass? Select all that apply. A) The periodic table can be used to calculate the molar mass of any substance. B) The molar mass is the mass in grams per mole of the substance. C)The units for molar mass are kg/mol. D)The term molar mass applies to compounds but not elements.
The periodic table can be used to calculate the molar mass of any substance. The molar mass is the mass in grams per mole of the substance.
Match each type of chemical formula with the correct definition. Empirical formula <--------> Molecular formula <--------> Structural formula <-------->
The simplest whole number ratio of elements in a compound Actual number of atoms of each element in a molecule matches Choice Shows the relative placement and connections of atoms in a molecule
Some covalent compounds are so common that they are named using "common" or "trivial" names instead of systematic names. Match each of the following compounds with its correct name. NH3 <-------> H2O <-------> PH3 <------->
ammonia water phosphine
The BrO3- ion is named bromate. What is the name of the oxoacid with the formula HBrO3?
bromic acid
The ionic compound CrCl3 is correctly named _____. A)chromium(III) chloride B) chromium trichloride C) chromium chloride
chromium(III) chloride
Match each molecule in the image shown with the correct description. A <-----------------> B <-----------------> C <----------------->
heteronuclear diatomic homonuclear diatomic polyatomic molecule
Match each molecule with the appropriate classification. Cl2 <--------------> HBr <--------------> CH2Cl2 <-------------->
homonuclear diatomic molecule heteronuclear diatomic molecule polyatomic molecule
Match each anion name on the left with the name of its corresponding acid on the right. chloride <--------> chlorite <--------> perchlorate <--------> phosphate <--------> phosphite <-------->
hydrochloric acid chlorous acid perchloric acid phosphoric acid phosphorous acid
Match each of the following polyatomic ions with its correct name. OH- <-------> NO2- <-------> NO3- <-------> PO43- <-------> NH4+ <------->
hydroxide nitrite nitrate phosphate ammonium
The bond typically observed when a metal bonds to a nonmetal is the _____ bond. The metal atom _____ one or more valence electrons while the nonmetal _____ electrons.
ionic; loses; gains
