Question 1

The angle between the bonds in a trigonal planar molecule is 120°.

Accepted Answer

A) True 
 B)False  True

Question 2

Calculate the mass of carbon in the following compounds.
A)10.0 g CH4
B)20.0 g C2H4
C)30.0 g CH3CH2CH2CH3
D)40.0 g (CH3)3N

Accepted Answer

A)7.49 g,
B)17.1 g,
C)24.8 g,
D)24.4 g

Question 3

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

Accepted Answer

A) Fe+3 
B) Fe+2 
C) Mn+2 
D) Mn+3 
A) Fe+3 
B) Fe+2 
C) Mn+2 
D) Mn+3 A

Question 4

An ion is:

Accepted Answer

A) an atom or a group of atoms that carries an electrical charge 
B) another term for an atom 
C) a molecule such as sucrose 
D) a substance formed by the combination of two elements 
A) an atom or a group of atoms that carries an electrical charge 
B) another term for an atom 
C) a molecule such as sucrose 
D) a substance formed by the combination of two elements

Question 5

How many electrons are in the second energy level for an atom of N?

Accepted Answer

A) 5 
B) 6 
C) 4 
D) 8 
A) 5 
B) 6 
C) 4 
D) 8

Question 6

What is the molecular geometry of a NH3 molecule?

Accepted Answer

A) Tetrahedral 
B) Trigonal planar 
C) Bent 
D) Trigonal pyramidal 
A) Tetrahedral 
B) Trigonal planar 
C) Bent 
D) Trigonal pyramidal

Question 7

Which of the following is one of the main cations in the body that maintains solution concentrations inside and outside the cell?

Accepted Answer

A) Fe2+ 
B) Ba2+ 
C) K+ 
D) NH4+ 
A) Fe2+ 
B) Ba2+ 
C) K+ 
D) NH4+

Question 8

What is the molecular geometry of CH2O?

Accepted Answer

A) Trigonal pyramidal 
B) Linear 
C) Tetrahedral 
D) Trigonal planar 
A) Trigonal pyramidal 
B) Linear 
C) Tetrahedral 
D) Trigonal planar

Question 9

The element Silicon has how many electrons in each of its energy levels?

Accepted Answer

A) 2, 8, 4 
B) 2, 6, 4 
C) 3, 5, 7 
D) 2, 8, 6 
A) 2, 8, 4 
B) 2, 6, 4 
C) 3, 5, 7 
D) 2, 8, 6

Question 10

Write name or chemical formula for the following compounds.
A)MgCO3
B)Aluminum chloride
C)Li2S
D)K3PO4
E)Sodium sulfate
F)Calcium nitride

Accepted Answer

A)magnesium carbonat

Question 11

Write either the name or the chemical formula for the following:
A)Iron (III)oxide
B)P4S10
C)Dinitrogen pentoxide
D)Mn(ClO3)4
E)CuI2

Accepted Answer

A)Fe₂O₃; B)tetraphosph

Question 12

Phosphorous trioxide is the correct name for P2O3.

Accepted Answer

A) True 
 B)False

Question 13

Which of the following ions does not have 18 electrons?

Accepted Answer

A) Cl- 
B) Ca2+ 
C) P3- 
D) O2- 
A) Cl- 
B) Ca2+ 
C) P3- 
D) O2-

Question 14

What is the mass of 3.61 moles of Ca?

Accepted Answer

A) 0)090 g 
B) 145 g 
C) 40.0 g 
D) 150 g 
A) 0)090 g 
B) 145 g 
C) 40.0 g 
D) 150 g

Question 15

Calculate the number of O atoms in each of the following compounds.
A)2.00 moles of H2O2
B)5.00 moles of CuSO4
C)6.00 moles of CuCl2.2H2O
D)8.00 moles of C6H12O6

Accepted Answer

A)2.41 × 10²⁴, B)1.20

Question 16

Which of the following elements contains 6 valence electrons?

Accepted Answer

A) Si 
B) P 
C) S 
D) Cl 
A) Si 
B) P 
C) S 
D) Cl

Question 17

A nonpolar molecule results from an equal sharing of electrons between atoms in a bond.

Accepted Answer

A) True 
 B)False

Question 18

How many electrons can be contained in the second energy level?

Accepted Answer

A) 2 
B) 8 
C) 10 
D) 18 
A) 2 
B) 8 
C) 10 
D) 18

Question 19

How many electrons are in the highest energy level of sulfur?

Accepted Answer

A) 2 
B) 4 
C) 6 
D) 8 
A) 2 
B) 4 
C) 6 
D) 8

Question 20

The charge on the nitrate ion is +1.

Accepted Answer

A) True 
 B)False

The angle between the bonds in a trigonal planar molecule is 120°.

Calculate the mass of carbon in the following compounds. A)10.0 g CH₄ B)20.0 g C₂H₄ C)30.0 g CH₃CH₂CH₂CH₃ D)40.0 g (CH₃)₃N

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

An ion is:

How many electrons are in the second energy level for an atom of N?

What is the molecular geometry of a NH₃ molecule?

Which of the following is one of the main cations in the body that maintains solution concentrations inside and outside the cell?

What is the molecular geometry of CH₂O?

The element Silicon has how many electrons in each of its energy levels?

Write name or chemical formula for the following compounds. A)MgCO₃ B)Aluminum chloride C)Li₂S D)K₃PO₄ E)Sodium sulfate F)Calcium nitride

Write either the name or the chemical formula for the following: A)Iron (III)oxide B)P₄S₁₀ C)Dinitrogen pentoxide D)Mn(ClO₃)₄ E)CuI₂

Phosphorous trioxide is the correct name for P₂O₃.

Which of the following ions does not have 18 electrons?

What is the mass of 3.61 moles of Ca?

Calculate the number of O atoms in each of the following compounds. A)2.00 moles of H₂O₂ B)5.00 moles of CuSO₄ C)6.00 moles of CuCl₂.2H₂O D)8.00 moles of C₆H₁₂O₆

Which of the following elements contains 6 valence electrons?

A nonpolar molecule results from an equal sharing of electrons between atoms in a bond.

How many electrons can be contained in the second energy level?

How many electrons are in the highest energy level of sulfur?

The charge on the nitrate ion is +1.

Chemistry Basics - Matter and Measurement

Atoms and Radioactivity

Introduction to Organic Compounds

Chemical Reactions

Carbohydrates - Lifes Sweet Molecules

Whats the Attraction State Changes, Solubility, and Lipids

Solution Chemistry: How Sweet Is Your Tea

Acids, Bases, and Buffers in the Body

Proteins - Workers of the Cell

Nucleic Acids - Big Molecules With a Big Role

Food As Fuel - A Metabolic Overview

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Exam 3: Compounds - Putting Particles Together

The angle between the bonds in a trigonal planar molecule is 120°.

Calculate the mass of carbon in the following compounds. A)10.0 g CH4 B)20.0 g C2H4 C)30.0 g CH3CH2CH2CH3 D)40.0 g (CH3)3N

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

An ion is:

How many electrons are in the second energy level for an atom of N?

What is the molecular geometry of a NH3 molecule?

Which of the following is one of the main cations in the body that maintains solution concentrations inside and outside the cell?

What is the molecular geometry of CH2O?

The element Silicon has how many electrons in each of its energy levels?

Write name or chemical formula for the following compounds. A)MgCO3 B)Aluminum chloride C)Li2S D)K3PO4 E)Sodium sulfate F)Calcium nitride

Write either the name or the chemical formula for the following: A)Iron (III)oxide B)P4S10 C)Dinitrogen pentoxide D)Mn(ClO3)4 E)CuI2

Phosphorous trioxide is the correct name for P2O3.

Which of the following ions does not have 18 electrons?

What is the mass of 3.61 moles of Ca?

Calculate the number of O atoms in each of the following compounds. A)2.00 moles of H2O2 B)5.00 moles of CuSO4 C)6.00 moles of CuCl2.2H2O D)8.00 moles of C6H12O6

Which of the following elements contains 6 valence electrons?

A nonpolar molecule results from an equal sharing of electrons between atoms in a bond.

How many electrons can be contained in the second energy level?

How many electrons are in the highest energy level of sulfur?

The charge on the nitrate ion is +1.

Chemistry Basics - Matter and Measurement

Atoms and Radioactivity

Introduction to Organic Compounds

Chemical Reactions

Carbohydrates - Lifes Sweet Molecules

Whats the Attraction State Changes, Solubility, and Lipids

Solution Chemistry: How Sweet Is Your Tea

Acids, Bases, and Buffers in the Body

Proteins - Workers of the Cell

Nucleic Acids - Big Molecules With a Big Role

Food As Fuel - A Metabolic Overview

Filters

Calculate the mass of carbon in the following compounds. A)10.0 g CH₄ B)20.0 g C₂H₄ C)30.0 g CH₃CH₂CH₂CH₃ D)40.0 g (CH₃)₃N

What is the molecular geometry of a NH₃ molecule?

What is the molecular geometry of CH₂O?

Write name or chemical formula for the following compounds. A)MgCO₃ B)Aluminum chloride C)Li₂S D)K₃PO₄ E)Sodium sulfate F)Calcium nitride

Write either the name or the chemical formula for the following: A)Iron (III)oxide B)P₄S₁₀ C)Dinitrogen pentoxide D)Mn(ClO₃)₄ E)CuI₂

Phosphorous trioxide is the correct name for P₂O₃.

Calculate the number of O atoms in each of the following compounds. A)2.00 moles of H₂O₂ B)5.00 moles of CuSO₄ C)6.00 moles of CuCl₂.2H₂O D)8.00 moles of C₆H₁₂O₆