Biochemistry

Which of the following anions has the same charge as the hydroxide ion?

Which of the following anions has the same charge as the hydroxide ion?

Which of the following anions has the same charge as the hydroxide ion?
A) NO3-
B) SO4-2
C) CO3-2
D) PO4-3

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Neves

Which of the following anions has the same charge as the carbonate ion?

Which of the following anions has the same charge as the carbonate ion?

Which of the following anions has the same charge as the carbonate ion?
A) SO4-2
B) NO3-
C) OH-
D) PO4-3

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Neves

Which of these polyatomic ions has a positive charge?

Which of these polyatomic ions has a positive charge?

Which of these polyatomic ions has a positive charge?
A) Ammonium
B) Hydroxide
C) Phosphate
D) Acetate

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Neves

How many protons and electrons are there in the iodide ion?

How many protons and electrons are there in the iodide ion?

How many protons and electrons are there in the iodide ion?
A) 53 protons, 52 electrons
B) 53 protons, 54 electrons
C) 53 protons, 55 electrons
D) 53 protons, 51 electrons

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Neves

How many protons and electrons are there in the sulfide ion?

How many protons and electrons are there in the sulfide ion?

How many protons and electrons are there in the sulfide ion?
A) 16 protons, 17 electrons
B) 16 protons, 16 electrons
C) 16 protons, 18 electrons
D) 16 protons, 15 electrons

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Neves

How many protons and electrons are there in the calcium ion?

How many protons and electrons are there in the calcium ion?

How many protons and electrons are there in the calcium ion?
A) 20 protons, 20 electrons
B) 20 protons, 22 electrons
C) 20 protons, 18 electrons
D) 20 protons, 19 electrons

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Neves

What is the name and symbol of an ion that has 26 protons and 23 electrons?

What is the name and symbol of an ion that has 26 protons and 23 electrons?

What is the name and symbol of an ion that has 26 protons and 23 electrons?
A) Fe+3
B) Fe+2
C) Mn+2
D) Mn+3

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Neves

Iron pyrite (fool's gold) is iron (II) sulfide. What is its formula?

Iron pyrite (fool's gold) is iron (II) sulfide. What is its formula?

Iron pyrite (fool's gold) is iron (II) sulfide. What is its formula?
A) FeS
B) FeSO3
C) FeSO4
D) Fe2S3

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Neves

Which of the following formulas is incorrect for a cobalt (III) compound?

Which of the following formulas is incorrect for a cobalt (III) compound?

Which of the following formulas is incorrect for a cobalt (III) compound?
A) CoCl3
B) CoCO3
C) Co2O3
D) CoPO4

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Neves

The correct name for Cr2O3 is:

The correct name for Cr2O3 is:

The correct name for Cr2O3 is:
A) chromium (III) oxide
B) chromium (II) oxide
C) chromium oxide
D) dichromium trioxide

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Neves

The reaction of calcium and sulfur produces:

The reaction of calcium and sulfur produces:

The reaction of calcium and sulfur produces:
A) Ca2S
B) CaS2
C) CaS
D) Ca2S3

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Neves

The reaction of magnesium and nitrogen produces:

The reaction of magnesium and nitrogen produces:

The reaction of magnesium and nitrogen produces:
A) Mg2N3
B) Mg3N2
C) MgN
D) Mg3N

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Neves

The reaction of aluminum and phosphorous produces:

The reaction of aluminum and phosphorous produces:

The reaction of aluminum and phosphorous produces:
A) AlP
B) Al3P
C) AlP3
D) Al2P3

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Neves

Which one of the compounds below is covalent?

Which one of the compounds below is covalent?

Which one of the compounds below is covalent?
A) LiF
B) NaF
C) HF
D) RbF

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Neves

Which one of these compounds is ionic?

Which one of these compounds is ionic?

Which one of these compounds is ionic?
A) NH4Cl
B) HI
C) H2CO3
D) NH3

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Neves

Which compound contains only covalent bonds?

Which compound contains only covalent bonds?

Which compound contains only covalent bonds?
A) NH4OH
B) Ca3(PO4)2
C) HC2H3O2
D) NaCl

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Neves

The total number of valence electrons in a molecule of SOF2 is:

The total number of valence electrons in a molecule of SOF2 is:

The total number of valence electrons in a molecule of SOF2 is:
A) 26
B) 24
C) 18
D) 20

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Neves

The total number of valence electrons in a molecule of C2H2F4 is:

The total number of valence electrons in a molecule of C2H2F4 is:

The total number of valence electrons in a molecule of C2H2F4 is:
A) 28
B) 32
C) 38
D) 48

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Neves

A double bond involves the sharing of ________ electron(s) between the atoms.

A double bond involves the sharing of ________ electron(s) between the atoms.

A double bond involves the sharing of ________ electron(s) between the atoms.
A) 2
B) 4
C) 6
D) 8

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Neves

What is the correct name for a molecule of SO3?

What is the correct name for a molecule of SO3?

What is the correct name for a molecule of SO3?
A) Sulfur trioxide
B) Sulfur oxide
C) Sulfite
D) Monosulfur trioxide

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Neves

What is the correct name for Cl2O7?

What is the correct name for Cl2O7?

What is the correct name for Cl2O7?
A) Chloric acid
B) Chlorine oxide
C) Dichloride oxide
D) Dichlorine heptoxide

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Neves

Which one of the compounds below is most likely to be ionic?

Which one of the compounds below is most likely to be ionic?

Which one of the compounds below is most likely to be ionic?
A) GaAs
B) SrBr2
C) NO2
D) CBr4

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Neves

What is the correct formula for dichlorine monoxide?

What is the correct formula for dichlorine monoxide?

What is the correct formula for dichlorine monoxide?
A) ClO
B) ClO2
C) Cl2O
D) Cl2O4

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Neves

How many single bonds does an atom of carbon normally make in a covalent molecule if there are no ...

How many single bonds does an atom of carbon normally make in a covalent molecule if there are no ...

How many single bonds does an atom of carbon normally make in a covalent molecule if there are no double or triple bonds?
A) 1
B) 2
C) 3
D) 4

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Neves

How many valence electrons would be found in the correct Lewis dot structure of C2H6?

How many valence electrons would be found in the correct Lewis dot structure of C2H6?

How many valence electrons would be found in the correct Lewis dot structure of C2H6?
A) 10
B) 14
C) 20
D) 28

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Neves

What is the mass of 3.61 moles of Ca?

What is the mass of 3.61 moles of Ca?

What is the mass of 3.61 moles of Ca?
A) 0.090 g
B) 145 g
C) 40.0 g
D) 150 g

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Neves

Which quantity contains the most moles?

Which quantity contains the most moles?

Which quantity contains the most moles?
A) 10 g CH4
B) 10 g CO2
C) 10 g SiO2
D) 10 g SO2

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Neves

The approximate bond angles between the atoms in a molecule with a trigonal planar electron pair ...

The approximate bond angles between the atoms in a molecule with a trigonal planar electron pair ...

The approximate bond angles between the atoms in a molecule with a trigonal planar electron pair geometry are:
A) 90°
B) 120°
C) 180°
D) 109.5°

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Neves

The approximate bond angles between the atoms in a molecule with a tetrahedral electron pair ...

The approximate bond angles between the atoms in a molecule with a tetrahedral electron pair ...

The approximate bond angles between the atoms in a molecule with a tetrahedral electron pair geometry are:
A) 90°
B) 120°
C) 180°
D) 109.5°

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Neves

What is the molecular geometry of a CO2 molecule?

What is the molecular geometry of a CO2 molecule?

What is the molecular geometry of a CO2 molecule?
A) Trigonal planar
B) Tetrahedral
C) Linear
D) Bent

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Neves

What is the molecular geometry of a NH3 molecule?

What is the molecular geometry of a NH3 molecule?

What is the molecular geometry of a NH3 molecule?
A) Tetrahedral
B) Trigonal planar
C) Bent
D) Trigonal pyramidal

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Neves

What is the molecular geometry of CH2O?

What is the molecular geometry of CH2O?

What is the molecular geometry of CH2O?
A) Trigonal pyramidal
B) Linear
C) Tetrahedral
D) Trigonal planar

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Neves

Which of these molecules has trigonal pyramidal molecular geometry?

Which of these molecules has trigonal pyramidal molecular geometry?

Which of these molecules has trigonal pyramidal molecular geometry?
A) NF3
B) BF3
C) SO3
D) AlF3

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Neves

Which atom is the most electronegative?

Which atom is the most electronegative?

Which atom is the most electronegative?
A) Li
B) Cs
C) P
D) Cl

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Neves

A bond where the electrons are shared unequally is called a(n):

A bond where the electrons are shared unequally is called a(n):

A bond where the electrons are shared unequally is called a(n):
A) polar covalent
B) coordinate covalent
C) purely (nonpolar) covalent
D) ionic

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Neves

A bond where the electrons are shared equally is called a(n):

A bond where the electrons are shared equally is called a(n):

A bond where the electrons are shared equally is called a(n):
A) polar covalent
B) coordinate covalent
C) nonpolar covalent
D) ionic

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Neves

Which of the following molecules is polar?

Which of the following molecules is polar?

Which of the following molecules is polar?
A) CH4
B) CO2
C) SO2
D) SO3

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Neves

Which of the following molecules is nonpolar?

Which of the following molecules is nonpolar?

Which of the following molecules is nonpolar?
A) NH3
B) CH3Cl
C) CCl4
D) H2O

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Neves

An ion containing 19 protons and 18 electrons is a cation.Pick whether it's true or false...

An ion containing 19 protons and 18 electrons is a cation.Pick whether it's true or false...

An ion containing 19 protons and 18 electrons is a cation.
Pick whether it's true or false...

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Neves

The charge on the nitrate ion is +1. (True or false?)

The charge on the nitrate ion is +1. (True or false?)

The charge on the nitrate ion is +1.
Is this statement T or F?

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Neves