Chem hw 4
N = 2 F = 6 each 26 valence electrons total
Draw the Lewis structure for NF3
tetrahedral, tetrahedral
Draw the Lewis structure of CBr₄ and then determine its electron domain and molecular geometries.
hybridization = sp³
Draw the Lewis structure of SCl₂ and then determine the hybridization of the central atom.
4
How many π bonds are in the structure of the organic molecule below?
16
How many σ bonds are in the structure of the organic molecule below?
two atoms share valence electrons and those shared electrons form the chemical bond.
In a covalent bond
Si = 8 (bonds) S = 2 each two double bonds 16 valence electrons total
SiS2 Lewis dot structure
valence electrons
Single, double, or triple covalent bonds in a carbon atom are formed from
Disulfer octachloride
What is the correct IUPAC name for S₂Cl₈?
the halogens
Which group in the periodic table tends to have high electronegativity values?
SO4^2-
Write the chemical formula for the sulfate ion
Xe = 2 dots O = 6 dots each 26 valence electrons total
A skeletal structure for XeO₃ is shown below. Starting from this structure, complete the Lewis structure that follows the octet rule on all atoms.
S=2 0=4 2 double bonds 18 valence electrons total
Draw the Lewis structure for SO₂ (by following the octet rule on all atoms) and then determine the number of nonbonding electron pairs on the central atom.
Angles of 90 and 120
Draw the Lewis structure of AsF₅ and then determine the ideal bonding angle(s) of the central atom.
trigonal planar, trigonal planar
Draw the Lewis structure of BH₃ and then determine its electron domain and molecular geometries.
polar
Draw the Lewis structure of PBr₃ and then determine if the molecule is polar or nonpolar.
10 val electrons on the central atoms
Draw the Lewis structure of PCl₅ and then choose the appropriate number of valence electrons on the central atom.
P = 2 F = 6 each 1 lone nonbonding pair on the central atom 26 valence electrons total
Draw the Lewis structure of PF₃ and then determine the number of nonbonding electron pairs on the central atom.
water is a bent molecule and oxygen is more electronegative than hydrogen.
Water is a polar molecule because...
calcium iodite
What is the correct IUPAC name for Ca(IO₂)₂?
Calcium carbonate
What is the correct IUPAC name for CaCO₃?
dichlorine heptoxide
What is the correct IUPAC name for Cl₂O₇?
Chromium (iii) bromate *Because this compound contains a transition metal that can form a cations (positive ions) with different charges, the specific charge of the cation in this compound is required in the form of Roman numerals.
What is the correct IUPAC name for Cr(BrO₃)₃?
Copper (I) chlorate
What is the correct IUPAC name for CuClO₃?
Iron (III) Hydroxide
What is the correct IUPAC name for Fe(OH)₃?
Perchloric acid
What is the correct IUPAC name for HClO₄(aq)?
Iodic acid
What is the correct IUPAC name for HIO₃(aq)?
Tin(IV) hypochlorite
What is the correct IUPAC name for Sn(ClO)₄?
Tin (IV) Sulfide
What is the correct IUPAC name for SnS₂?
titanium (IV) oxide
What is the correct IUPAC name for TiO₂?
Tungsten (IV) oxide
What is the correct IUPAC name for WO₂?
Yttrium (III) chromate
What is the correct IUPAC name for Y₂(CrO₄)₃?
Ni(BrO)₂ *The (II) in nickel(II) hypobromite indicates that the nickel ion has a +2 charge. Hypobromite is a polyatomic ion that has a -1 charge. Two hypobromite ions would be needed to balance the charge on the nickel ion.
What is the correct formula for nickel (II) hypobromite?
HF *A dipole moment is a separation of charge within a molecule. A dipole moment occurs due to difference in electronegativity between the bonded atoms. Greater differences in electronegativity lead to a larger dipole moment. In this case, the differences in electronegativity values between hydrogen and fluorine is the greatest. Therefore, HF will have the largest dipole moment.
Which diatomic molecule has the largest dipole moment?
F - F *In order to be nonpolar, the two atoms in the chemical bond need to have the same electronegativity.
Which of the following bonds is a nonpolar covalent bond?
HClO3
Write the chemical formula for chloric acid
nitrous acid
What is the correct IUPAC name for HNO₂(aq)?
Iron (III) Hydroxide - Fe₃OH *Consider the charge of the ions to make sure the charges are balanced. For the transition metals, the charge is indicated in the name with a Roman numeral in parentheses. For example, iron(III) hydroxide indicates that the iron ion has a +3 charge. Hydroxide is a polyatomic ion that has a -1 charge. Three hydroxide ions would be needed to balance the charge on one iron ion. This yields the formula Fe(OH)₃.
Which has the incorrect name-formula combination?
Phosphorus tribormide
What is the correct IUPAC name for PBr₃?
O = 4 H = 2 each (bonds) 8 valence electrons total Hydrogen only needs 2 valence electrons to have a full outer shell
H20 Lewis dot structure
Phosphoric acid
What is the correct IUPAC name for H₃PO₄(aq)?
H - Cl *Polar bonds occur between two nonmetals and have a difference in electronegativities of the atoms.
Which of the following bonds is a polar covalent bond?
HClO4
Write the formula for perchloric acid
C - F *Polar bonds occur between two nonmetals and have a difference in electronegativities of the atoms. The further apart two atoms are in the same period, the greater the polarity of the bond.
Based on their position in the periodic table, which of the following bonds is the most polar?
24σ and 7π
Determine the number of sigma (σ) and pi (π) bonds in the molecule shown on the left below.
P = 2 Cl = 6 each 26 valence electrons total
Determine the number of valence electrons in PCl₃ and then draw the corresponding Lewis structure.
octahedral, square planar
Draw the Lewis structure of ICl₄⁻ and then determine its electron domain and molecular geometries.
hybridization = sp³d²
Draw the Lewis structure of IF₅ and then determine the hybridization of the central atom.
hybridization = sp³d²
Draw the Lewis structure of KrF₄ and then determine the hybridization of the central atom.
octahedral, octahedral
Draw the Lewis structure of SeF₆ and then determine its electron domain and molecular geometries.
180 degree angles
Draw the Lewis structure of XeF₂ and then determine the ideal bonding angle(s) of the central atom.
polar
Draw the Lewis structure of carbon monoxide (CO) and then determine if the molecule is polar or nonpolar. Please place the elements in the order that they are written.
Manganese (II) cyanide
What is the correct IUPAC name for Mn(CN)₂?
nitrogen triiodide
What is the correct IUPAC name for NI₃?
selenium difluoride
What is the correct IUPAC name for SeF₂?
Manganese (II) sulfide - MnS *Consider the charge of the ions to make sure the charges are balanced. For the transition metals, the charge is indicated in the name with a Roman numeral in parentheses. For example, manganese(II) sulfide indicates that the manganese ion has a +2 charge. Sulfide has a -2 charge. The formula for manganese(II) sulfide would be MnS.
Which has the correct name-formula combination?
C *A neutral atom of Al has 3 valence electrons.
Which of the following is the correct Lewis symbol for a neutral atom of Al?
B *A neutral atom of Ca has two valence electrons. In order to be isoelectronic with a noble gas, calcium will lose two valence electrons.
Which of the following is the correct Lewis symbol for the calcium ion?
C *A neutral atom of N has 5 valence electrons. A nitride ion has a -3 charge, meaning it has 8 valence electrons.
Which of the following is the correct Lewis symbol for the nitride ion?
Sodium (Na) *Alkali metals and alkaline earth metals have lower electronegativities.
Which one of the following is the least electronegative?
HBr (aq)
Write the chemical formula for hydrobromic acid
HBrO
Write the chemical formula for hypobromous acid
KrCl2
Write the chemical formula for krypton dichloride
PH3
Write the chemical formula for phosphorus trihydride
SO2
Write the chemical formula for sulfur dioxide
P4S6
Write the chemical formula for tetraphosphorus hexasulfide
NH4^+
Write the chemical formula for the ammonium ion
ClO2^-
Write the chemical formula for the chlorite ion
OH^-
Write the chemical formula for the hydroxide ion
H3P
Write the formula for hydrophosphoric acid
H2SO3
Write the formula for sulfurous acid
