1|Page
WGU D425 EXAM 1 WITH QUESTIONS AND 100%
CORRECT ANSWERS|| LATEST AND COMPLETE
VERSION 2025-2026 WITH EXPERT VERIFIED
SOLUTIONS|| ASSURED PASS
What is the correct name for HCIO4
Perchloric acid. CIO4- polyatomic ion is present, and since the problem involves
an acid, chlorate changes to chloric
Term (aq) stands for aqueous.
What is the name of the following acid: HF(aq)
Hydrofluoric acid. Prefix hydro is placed in front of the nonmetal with a name that
ends in -ic. If HF were in a gaseous state, the name of the acid would be hydrogen
fluoride. The element name is used to name the cation, and the name of the anion
ends with - ide
What is the correct name for cah2
Calcium hydride. Name of the metal is written as it is, and the name of the
nonmetal ends with -ide
What is the charge of the ion formed by calcium (Ca)
+2. Calcium is a metal in group 2. Metal in group 2 lose 2 electron because this
would allow them to have 8 electrons(octet) in their outermost shell
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Which compound would you expect to be ionic
H2S CO2 NH3
Srcl2
Srcl2. Ionic compounds have ionic bonds, ionic bonds involve a metal Sr and a
nonmetal Cl
What is the correct name for a molecule of SO3
Sulfur trioxide
What is the correct name for Cl2O7
Dichlorine heptoxide
What is the correct name for a molecular unit of H2O
Dihydrogen monoxide
What is the approximate bond angle btwn the atoms in a molecule with a
tetrahedral electron pair geometry?
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109.5' tetrahedral bond angle based on VSEPR theory. This angle is obtained when
all 4 pairs of outer electrons repel each other equally.
What is the molecular geometry of CH2O
Trigonal planar. 3 groups of atoms or 3 bonded groups and zero lone pairs around
the central atom (carbon). VSEPR suggest that molecules with 3 groups around the
central atom have trigonal planar geometry. Bond angle 120'
Which atom is the most electronegative: P, Li, Cs, Cl?
Cl. Electronegativity increases as you move to the right of the periodic table and as
you move down a group.
Which covalent single bond is the least polar btwn: N-C, O-C, O- N, C-H
(electronegativity) H-2.1, C-2.5, N-3.0, O-3.5
C-H is a nonpolar covalent bond as the electronegativity difference for C-H bond is
0.4
Which element is the least electronegative in this series: Cs, Li, P & Cl
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CS electronegativity increases as you move to the right of the periodic table and as
you move down a group. Cs is least electronegative.
What is the bond angle btwn 2 atoms in a trigonal planar geometry
120 degrees angle bond
How many atoms are in 14 moles of cadmium (Cd)
8.4 x 10^24 atoms Cd. Avogadro's number (6.02 x 10^23) used to convert the
number of moles to atoms
What is the molar mass for C6H12O6?
180.2g/mol. A single carbon atom has a mass 12g/mol. A single oxygen atom has a
mass of 16g/mol, and a single hydrogen atom has a mass of 1g/mol. Add all the
carbons, hydrogens and oxygens in the molecular formula
What is the molar mass for Mg(OH)2
58.32 g/mol a single magnesium atom has a mass of
24.31 g/mol, and a single hydrogen atom has a mass of 1 g/mol Add the mass for
magnesium, hydrogen, and oxygen
WGU D425 EXAM 1 WITH QUESTIONS AND 100%
CORRECT ANSWERS|| LATEST AND COMPLETE
VERSION 2025-2026 WITH EXPERT VERIFIED
SOLUTIONS|| ASSURED PASS
What is the correct name for HCIO4
Perchloric acid. CIO4- polyatomic ion is present, and since the problem involves
an acid, chlorate changes to chloric
Term (aq) stands for aqueous.
What is the name of the following acid: HF(aq)
Hydrofluoric acid. Prefix hydro is placed in front of the nonmetal with a name that
ends in -ic. If HF were in a gaseous state, the name of the acid would be hydrogen
fluoride. The element name is used to name the cation, and the name of the anion
ends with - ide
What is the correct name for cah2
Calcium hydride. Name of the metal is written as it is, and the name of the
nonmetal ends with -ide
What is the charge of the ion formed by calcium (Ca)
+2. Calcium is a metal in group 2. Metal in group 2 lose 2 electron because this
would allow them to have 8 electrons(octet) in their outermost shell
,2|Page
Which compound would you expect to be ionic
H2S CO2 NH3
Srcl2
Srcl2. Ionic compounds have ionic bonds, ionic bonds involve a metal Sr and a
nonmetal Cl
What is the correct name for a molecule of SO3
Sulfur trioxide
What is the correct name for Cl2O7
Dichlorine heptoxide
What is the correct name for a molecular unit of H2O
Dihydrogen monoxide
What is the approximate bond angle btwn the atoms in a molecule with a
tetrahedral electron pair geometry?
,3|Page
109.5' tetrahedral bond angle based on VSEPR theory. This angle is obtained when
all 4 pairs of outer electrons repel each other equally.
What is the molecular geometry of CH2O
Trigonal planar. 3 groups of atoms or 3 bonded groups and zero lone pairs around
the central atom (carbon). VSEPR suggest that molecules with 3 groups around the
central atom have trigonal planar geometry. Bond angle 120'
Which atom is the most electronegative: P, Li, Cs, Cl?
Cl. Electronegativity increases as you move to the right of the periodic table and as
you move down a group.
Which covalent single bond is the least polar btwn: N-C, O-C, O- N, C-H
(electronegativity) H-2.1, C-2.5, N-3.0, O-3.5
C-H is a nonpolar covalent bond as the electronegativity difference for C-H bond is
0.4
Which element is the least electronegative in this series: Cs, Li, P & Cl
, 4|Page
CS electronegativity increases as you move to the right of the periodic table and as
you move down a group. Cs is least electronegative.
What is the bond angle btwn 2 atoms in a trigonal planar geometry
120 degrees angle bond
How many atoms are in 14 moles of cadmium (Cd)
8.4 x 10^24 atoms Cd. Avogadro's number (6.02 x 10^23) used to convert the
number of moles to atoms
What is the molar mass for C6H12O6?
180.2g/mol. A single carbon atom has a mass 12g/mol. A single oxygen atom has a
mass of 16g/mol, and a single hydrogen atom has a mass of 1g/mol. Add all the
carbons, hydrogens and oxygens in the molecular formula
What is the molar mass for Mg(OH)2
58.32 g/mol a single magnesium atom has a mass of
24.31 g/mol, and a single hydrogen atom has a mass of 1 g/mol Add the mass for
magnesium, hydrogen, and oxygen
