(a) Interpretation: Whether a tiny ant can be seen by optical microscope but not by human eye or not should be determined. Concept introduction: Objects are categorized on the basis of size range they fall in. Macroscopic objects are those which lie in the size range that human eye can perceive and microscopic objects are those which need the use of specialized instruments like electron microscope or atomic force microscope. Human eye can detect approximately up to the size of 10 μm and optical microscope can detect in the size range of 1 mm − 1 μm . Detection size limit for (EM) electron microscope and (AFM) atomic force microscope is 100 μm − 100 pm and 5 μm − 100 pm , respectively.
(a) Interpretation: Whether a tiny ant can be seen by optical microscope but not by human eye or not should be determined. Concept introduction: Objects are categorized on the basis of size range they fall in. Macroscopic objects are those which lie in the size range that human eye can perceive and microscopic objects are those which need the use of specialized instruments like electron microscope or atomic force microscope. Human eye can detect approximately up to the size of 10 μm and optical microscope can detect in the size range of 1 mm − 1 μm . Detection size limit for (EM) electron microscope and (AFM) atomic force microscope is 100 μm − 100 pm and 5 μm − 100 pm , respectively.
Whether a tiny ant can be seen by optical microscope but not by human eye or not should be determined.
Concept introduction:
Objects are categorized on the basis of size range they fall in. Macroscopic objects are those which lie in the size range that human eye can perceive and microscopic objects are those which need the use of specialized instruments like electron microscope or atomic force microscope.
Human eye can detect approximately up to the size of 10μm and optical microscope can detect in the size range of 1mm−1μm. Detection size limit for (EM) electron microscope and (AFM) atomic force microscope is 100μm−100pm and 5μm−100pm, respectively.
Interpretation Introduction
(b)
Interpretation:
Whether a cell with 5μm can be seen by optical microscope but not by human eye or not should be determined.
Concept introduction:
Objects are categorized on the basis of size range they fall in. Macroscopic objects are those which lie in the size range that human eye can perceive and microscopic objects are those which need the use of specialized instruments like electron microscope or atomic force microscope.
Human eye can detect approximately up to the size of 10μm and optical microscope can detect in the size range of 1mm−1μm. Detection size limit for (EM) electron microscope and (AFM) atomic force microscope is 100μm−100pm and 5μm−100pm, respectively.
Interpretation Introduction
(c)
Interpretation:
Whether a virus can be seen by optical microscope but not by human eye or not should be determined.
Concept introduction:
Objects are categorized on the basis of size range they fall in. Macroscopic objects are those which lie in the size range that human eye can perceive and microscopic objects are those which need the use of specialized instruments like electron microscope or atomic force microscope.
Human eye can detect approximately up to the size of 10μm and optical microscope can detect in the size range of 1mm−1μm. Detection size limit for (EM) electron microscope and (AFM) atomic force microscope is 100μm−100pm and 5μm−100pm, respectively.
d)
Interpretation Introduction
Interpretation:
Whether a molecule can be seen by optical microscope but not by human eye or not should be determined.
Concept introduction:
Objects are categorized on the basis of size range they fall in. Macroscopic objects are those which lie in the size range that human eye can perceive and microscopic objects are those which need the use of specialized instruments like electron microscope or atomic force microscope.
Human eye can detect approximately up to the size of 10μm and optical microscope can detect in the size range of 1mm−1μm. Detection size limit for (EM) electron microscope and (AFM) atomic force microscope is 100μm−100pm and 5μm−100pm, respectively.
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?
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(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?
1. Show the steps necessary to make 2-methyl-4-nonene using a
Wittig reaction. Start with triphenylphosphine and an alkyl
halide. After that you may use any other organic or inorganic
reagents.
2. Write in the product of this reaction:
CH3
CH₂
(C6H5)₂CuLi
H₂O+
3. Name this compound properly, including stereochemistry.
H₂C
H3C
CH3
OH
4. Show the step(s) necessary to transform the compound on the
left into the acid on the right.
Bri
CH2
5. Write in the product of this
LiAlH4
Br
H₂C
OH