65% of Body Weight
Oxygen is present in water and other compounds.
Oxygen is necessary for respiration. You will find this element in the lungs, since about 20% of the air you breathe is oxygen.
Photograph of graphite,
one of the forms of elemental carbon.
U.S. Geological Survey
Three characteristics are used to classify monosaccharides:
aldose - monosaccharide in which the carbonyl group is an aldehyde
ketone - monosaccharide in which the carbonyl group is a ketone
triose - monosaccharide with 3 carbon atoms
tetrose - monosaccharide with 4 carbon atoms
pentose - monosaccharide with 5 carbon atoms
hexose - monosaccharide with 6 carbon atoms
aldohexose - 6-carbon aldehyde (e.g., glucose)
aldopentose - 5-carbon aldehyde (e.g., ribose)
ketohexose - 6-carbon hexose (e.g., fructose)
A monosaccharide is D or L depending on the orientation of the asymmetric carbon located furthest from the carbonyl group. In a D sugar, the hydroxyl group is on the right the molecule when written as a Fischer projection. If the hydroxyl group is on the left of the molecule, then it is an L sugar.
Balance the equation.
Indicate the physical states of the reactants and products.