Question

1 mole of glucose $(C_6H_{12}O_6)$ contains

• A. 6 g. molecule of Hydrogen
• B. 6 g. atoms of carbon
• C. 12 g. atoms of Hydrogen
• D. 3 g. molecules of oxygen

Answer 1

Answer: (B), (C)

The correct options are (b) and (c).

Answer 2

The chemical formula $C_6H_{12}O_6$ indicates that one molecule of glucose contains 6 carbon atoms, 12 hydrogen atoms, and 6 oxygen atoms. Therefore, 1 mole of glucose contains 6 moles of Carbon atoms, 12 moles of Hydrogen atoms, and 6 moles of Oxygen atoms.

A 'g. atom' (gram atom) of an element is equivalent to 1 mole of atoms of that element. A 'g. molecule' (gram molecule) of a substance is equivalent to 1 mole of molecules of that substance.

Analyzing the options: (a) 6 g. molecule of Hydrogen implies 6 moles of $H_2$ molecules. Glucose contains hydrogen atoms, not $H_2$ molecules. This is incorrect. (b) 6 g. atoms of carbon implies 6 moles of carbon atoms. Since 1 mole of glucose contains 6 moles of carbon atoms, this is correct. (c) 12 g. atoms of Hydrogen implies 12 moles of hydrogen atoms. Since 1 mole of glucose contains 12 moles of hydrogen atoms, this is correct. (d) 3 g. molecules of oxygen implies 3 moles of $O_2$ molecules. Glucose contains oxygen atoms, not $O_2$ molecules. This is incorrect.