The monosaccharides that are formed in a modified Kiliani-Fischer synthesis starting with D − xylose are to be stated. Concept Introduction: Monosaccharides are made from the biomolecules that comprise carbon, oxygen and hydrogen atoms. These molecules cannot be broken into the simpler compounds. The disaccharides and polysaccharides further formed from monosaccharide units. The numbers of isomers are obtained from biomolecules due to the chiral nature of carbon atoms. Chiral molecules are those molecules that consist of different groups or atoms around the central atom. Isomers are those compounds that have a same molecular formula but a different arrangement of atoms, groups or substituent's in a compound.

Question

2. Make an ice cube at 1 bar pressure by freezing an amount of liquid water that is 2 cm x 2 cm x 2 cm in volume. The density of liquid water at 0 °C is 1.000 g cm³ and the density of ice at 0 °C is 0.915 g cm³. Note that this difference in density is the reason your water pipes burst if they freeze and why you shouldn't forget to take your bottle of pop out of the freezer if you put it in there to try and cool it down faster. A. What is the work of expansion upon freezing? B. Is work done on the system or by the system?

Answer 1

Question

Chapter 20.7, Problem 15P

a)

Interpretation Introduction

Interpretation:

The monosaccharides that are formed in a modified Kiliani-Fischer synthesis starting with D−xylose are to be stated.

Concept Introduction:

Monosaccharides are made from the biomolecules that comprise carbon, oxygen and hydrogen atoms. These molecules cannot be broken into the simpler compounds. The disaccharides and polysaccharides further formed from monosaccharide units. The numbers of isomers are obtained from biomolecules due to the chiral nature of carbon atoms. Chiral molecules are those molecules that consist of different groups or atoms around the central atom. Isomers are those compounds that have a same molecular formula but a different arrangement of atoms, groups or substituent's in a compound.

b)

Interpretation Introduction

Interpretation:

The monosaccharides that are formed in a modified Kiliani-Fischer synthesis starting with L−threose are to be stated.

Concept Introduction:

Monosaccharides are made from the biomolecules that comprise carbon, oxygen and hydrogen atoms. These molecules cannot be broken into the simpler compounds. The disaccharides and polysaccharides further formed from monosaccharide units. The numbers of isomers are obtained from biomolecules due to the chiral nature of carbon atoms. Chiral molecules are those molecules that consist of different groups or atoms around the central atom. Isomers are those compounds that have a same molecular formula but a different arrangement of atoms, groups or substituent's in a compound.

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