(a) Interpretation: The term SI base units need to be defined. Concept introduction: The term is defined as a phrase or word to explain a concept or thing. For example: for the description “anything that occupies space and have mass” is termed as matter. Symbol is a character used to represent a function, object or process. For example: the SI unit of mass is kilograms and its symbol is kg.
(a) Interpretation: The term SI base units need to be defined. Concept introduction: The term is defined as a phrase or word to explain a concept or thing. For example: for the description “anything that occupies space and have mass” is termed as matter. Symbol is a character used to represent a function, object or process. For example: the SI unit of mass is kilograms and its symbol is kg.
Solution Summary: The author explains the definition of SI base units and the rules for determining significant figures in a number.
The term is defined as a phrase or word to explain a concept or thing. For example: for the description “anything that occupies space and have mass” is termed as matter.
Symbol is a character used to represent a function, object or process. For example: the SI unit of mass is kilograms and its symbol is kg.
Interpretation Introduction
(b)
Interpretation:
The term significant figures needs to be defined.
Concept introduction:
The term is defined as a phrase or word to explain a concept or thing. For example: for the description “anything that occupies space and have mass” is termed as matter.
Symbol is a character used to represent a function, object or process. For example: the SI unit of mass is kilograms and its symbol is kg.
Interpretation Introduction
(c)
Interpretation:
The term natural law needs to be defined.
Concept introduction:
The term is defined as a phrase or word to explain a concept or thing. For example: for the description “anything that occupies space and have mass” is termed as matter.
Symbol is a character used to represent a function, object or process. For example: the SI unit of mass is kilograms and its symbol is kg.
Interpretation Introduction
(d)
Interpretation:
The term exponential notation needs to be defined.
Concept introduction:
The term is defined as a phrase or word to explain a concept or thing. For example: for the description “anything that occupies space and have mass” is termed as matter.
Symbol is a character used to represent a function, object or process. For example: the SI unit of mass is kilograms and its symbol is kg.
21.38 Arrange the molecules in each set in order of increasing acidity (from least acidic to
most acidic).
OH
OH
SH
NH2
8
NH3
OH
(b)
OH
OH
OH
(c)
& & &
CH3
NO2
21.39 Explain the trends in the acidity of phenol and the monofluoro derivatives of phenol.
OH
OH
OH
OH
PK 10.0
PK 8.81
PK 9.28
PK 9.81
identify which spectrum is for acetaminophen and which is for phenacetin
The Concept of Aromaticity
21.15 State the number of 2p orbital electrons in each molecule or ion.
(a)
(b)
(e)
(f)
(c)
(d)
(h)
(i)
DA
(k)
21.16 Which of the molecules and ions given in Problem 21.15 are aromatic according to the
Hückel criteria? Which, if planar, would be antiaromatic?
21.17 Which of the following structures are considered aromatic according to the Hückel
criteria?
---0-0
(a)
(b)
(c)
(d)
(e)
(h)
H
-H
.8.0-
21.18 Which of the molecules and ions from Problem 21.17 have electrons donated by a
heteroatom?