The Monosaccharide Ribose, C₅H₁₀O₅ May Exist in Five Distinct Conformations

question 2

Multiple Choice

The monosaccharide ribose, C₅H₁₀O₅ may exist in five distinct conformations. Two of these conformations are six-membered rings and two are five-membered rings, with the remaining conformation being a straight chain. In a solution at 25 C, a sample of ribose was found to exist as 60% α-D-ribopyranose and 21% β-D-ribopyranose. Calculate the difference in molar energy between these two conformations, which differ only in the orientation of the anomeric hydroxyl group

• A) 0.22 kJ mol^-1
• B) 1.2 kJ mol^-1
• C) 2.6 kJ mol^-1
• D) 4.0 kJ mol^-1

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Definitions:

Direct Labor Hours

The total hours worked by employees directly involved in the manufacturing process or production of goods.

Budgeted Overhead

The estimated costs for overhead (indirect costs such as utilities, rent, and administrative salaries) that are planned for during a specific period in the budgeting process.

Total Overhead Rate

A ratio that calculates the total indirect costs of manufacture (including both fixed and variable overheads) relative to a related cost base, typically direct labor or machine hours.

Direct Labor Hours

Hours worked by employees that are directly involved in the manufacturing process, crucial for calculating product costs.