Question 1

The formula for isopropyl alcohol is sometimes written as (CH₃)₂CHOH to better indicate how the atoms are connected. How many hydrogen atoms would be contained in 3 dozen isopropyl alcohol molecules

Accepted Answer

Each isopropyl alcohol molecule, (CH₃)₂CHOH, contains 8 hydrogen atoms. Therefore, 3 dozen (36) molecules would contain 36 x 8 = 288 hydrogen atoms.

Question 2

An allotrope is one of the two or more distinct forms of an element.

Accepted Answer

This is the correct definition of allotrope.

Question 3

Use the following to answer questions

-Use the periodic table above to locate where the halogen elements are located.

Accepted Answer

The halogen elements are located in Group 7A of the periodic table, which includes fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At).

Question 4

Give the formula for potassium oxide.

Accepted Answer

Potassium oxide is formed by the combination of two potassium ions (K⁺) and one oxide ion (O²⁻), resulting in the formula K₂O.

Question 5

Give the formula for nickel(II) sulfite.

Accepted Answer

Nickel(II) sulfite is represented by the formula NiSO3, where Ni stands for nickel, S for sulfur, and O3 indicates three oxygen atoms.

Question 6

An ion is an atom or group of atoms that has a net positive or negative charge.

Accepted Answer

An ion is an atom or group of atoms that has a net positive or negative charge.

Question 7

How many carbon atoms are in one molecule of CH₃(CH₂)₃CH₃

Accepted Answer

Counting the number of carbon atoms in the molecule, we can see that there is only one carbon atom in each repeat unit, which is repeated 3 times. So, there are a total of 3 carbon atoms in the whole molecule.

Question 8

An empirical formula tell us which ions are present in a compound and gives the whole-number ratio of the atoms of these elements in the compound.

Accepted Answer

The answer of An empirical formula tell us which ions...

Question 9

Which, if any, defines the term molecule

Accepted Answer

A molecule is defined as an aggregate of two or more atoms held together by chemical forces in a definite arrangement. This definition covers the concept of molecules in most chemical applications. Choices A, B, and D are incorrect because they do not accurately represent the definition of the term molecule.

Question 10

Give the formula for potassium hydroxide.

Accepted Answer

The formula for potassium hydroxide is KOH, which means potassium (K) and hydroxide (OH) are combined in a 1:1 ratio. Choice B, D, and E have extra elements or parentheses that are not necessary in the formula. Choice C only has potassium and oxygen, but not hydroxide.

Question 11

Name the following binary compound: MnCl₂.

Accepted Answer

The compound includes the symbols for manganese (Mn), chlorine (Cl) and sulfur (S). The subscripts indicate that there is one chloride ion (Cl-) and one sulfide ion (S2-), making the compound MnClS. The roman numeral in parentheses after the manganese (II) symbol indicates the charge on the manganese ion. Therefore, the correct name for the compound is manganese (II) chloride.

Question 12

Give the formula for carbon disulfide.

Accepted Answer

The formula for carbon disulfide is CS₂, which consists of one carbon atom and two sulfur atoms.

Question 13

A molecule of antifreeze, ethylene glycol, has the formula C₂H₄(OH) ₂. How many atoms are there in one molecule of antifreeze

Accepted Answer

The answer of A molecule of antifreeze, ethylene glycol, has...

Question 14

How many hydrogen atoms are in one molecule of CH₃(CH₂)₃CH₃

Accepted Answer

The molecule given is CH3(CH2)13CH3. This molecule has 3 hydrogen atoms from the first CH3 group, 13 CH2 groups each contributing 2 hydrogen atoms (13*2=26), and another 3 hydrogen atoms from the last CH3 group. Adding these together gives 3 + 26 + 3 = 32 hydrogen atoms. Therefore, the correct answer is not listed among the options provided.

Question 15

Use the following to answer questions

-Use the periodic table above to locate where the noble gases are located.

Accepted Answer

The noble gases, also known as Group 18 elements, are located in Group 8A on the periodic table.

Question 16

Name the following binary compound: NaH.

Accepted Answer

The correct name for NaH is Sodium hydride.

Question 17

There are the seven elements that naturally occur as diatomic molecules. This list contains four of those plus one that does not fit this distinction. Which one of the following does not occur naturally as a diatomic molecule

Accepted Answer

Neon is a noble gas and does not naturally occur as a diatomic molecule. It exists as a monatomic gas in its natural state. The other four elements listed occur naturally as diatomic molecules.

Question 18

The elements known as the halogens are useful as disinfectants. Of the following which is NOT a halogen

Accepted Answer

Oxygen is not a halogen. The halogens consist of five elements: fluorine, chlorine, bromine, iodine, and astatine.

Question 19

Name the following binary compound: FeS.

Accepted Answer

Iron (II) sulfide is the correct name for FeS because iron can have multiple oxidation states, and in this compound, iron has a +2 oxidation state, denoted as (II) in the name.

Question 20

Give the formula for magnesium chloride.

Accepted Answer

The formula for magnesium chloride is MgCl2, which corresponds to choice D. The other choices either have incorrect elemental symbols or incorrect subscripts.

Quiz 2: Atoms Molecules and Ions

The formula for isopropyl alcohol is sometimes written as (CH₃) ₂CHOH to better indicate how the atoms are connected. How many hydrogen atoms would be contained in 3 dozen isopropyl alcohol molecules

An allotrope is one of the two or more distinct forms of an element.

Use the following to answer questions -Use the periodic table above to locate where the halogen elements are located.

Give the formula for potassium oxide.

Give the formula for nickel(II) sulfite.

An ion is an atom or group of atoms that has a net positive or negative charge.

How many carbon atoms are in one molecule of CH₃(CH₂) ₃CH₃

An empirical formula tell us which ions are present in a compound and gives the whole-number ratio of the atoms of these elements in the compound.

Which, if any, defines the term molecule

Give the formula for potassium hydroxide.

Name the following binary compound: MnCl₂.

Give the formula for carbon disulfide.

A molecule of antifreeze, ethylene glycol, has the formula C₂H₄(OH) ₂. How many atoms are there in one molecule of antifreeze

How many hydrogen atoms are in one molecule of CH₃(CH₂) ₃CH₃

Use the following to answer questions -Use the periodic table above to locate where the noble gases are located.

Name the following binary compound: NaH.

There are the seven elements that naturally occur as diatomic molecules. This list contains four of those plus one that does not fit this distinction. Which one of the following does not occur naturally as a diatomic molecule

The elements known as the halogens are useful as disinfectants. Of the following which is NOT a halogen

Name the following binary compound: FeS.

Give the formula for magnesium chloride.

Quiz 2: Atoms Molecules and Ions

The formula for isopropyl alcohol is sometimes written as (CH3) 2CHOH to better indicate how the atoms are connected. How many hydrogen atoms would be contained in 3 dozen isopropyl alcohol molecules

An allotrope is one of the two or more distinct forms of an element.

Use the following to answer questions -Use the periodic table above to locate where the halogen elements are located.

Give the formula for potassium oxide.

Give the formula for nickel(II) sulfite.

An ion is an atom or group of atoms that has a net positive or negative charge.

How many carbon atoms are in one molecule of CH3(CH2) 3CH3

An empirical formula tell us which ions are present in a compound and gives the whole-number ratio of the atoms of these elements in the compound.

Which, if any, defines the term molecule

Give the formula for potassium hydroxide.

Name the following binary compound: MnCl2.

Give the formula for carbon disulfide.

A molecule of antifreeze, ethylene glycol, has the formula C2H4(OH) 2. How many atoms are there in one molecule of antifreeze

How many hydrogen atoms are in one molecule of CH3(CH2) 3CH3

Use the following to answer questions -Use the periodic table above to locate where the noble gases are located.

Name the following binary compound: NaH.

There are the seven elements that naturally occur as diatomic molecules. This list contains four of those plus one that does not fit this distinction. Which one of the following does not occur naturally as a diatomic molecule

The elements known as the halogens are useful as disinfectants. Of the following which is NOT a halogen

Name the following binary compound: FeS.

Give the formula for magnesium chloride.

The formula for isopropyl alcohol is sometimes written as (CH₃) ₂CHOH to better indicate how the atoms are connected. How many hydrogen atoms would be contained in 3 dozen isopropyl alcohol molecules

How many carbon atoms are in one molecule of CH₃(CH₂) ₃CH₃

Name the following binary compound: MnCl₂.

A molecule of antifreeze, ethylene glycol, has the formula C₂H₄(OH) ₂. How many atoms are there in one molecule of antifreeze

How many hydrogen atoms are in one molecule of CH₃(CH₂) ₃CH₃