The molecular weight of Ribose (C₅H₁₀O₅) is 150.1305.

To calculate molecular weight of any compound, the first step is to know the constituent atoms and their number in that particular compound. Then calculate the total weight of each atom by multiplying its atomic weight by its number. The sum of total weight of all constituent atoms will be the molecular weight of the compound. Note that the value of atomic weight may differ slightly from different sources.

CALCULATION PROCEDURE: Ribose (C₅H₁₀O₅) Molecular Weight Calculation

Step 1: Find out the chemical formula and determine constituent atoms and their number in a Ribose molecule.
From the chemical formula, you will know different atoms and their number in a Ribose molecule. Chemical formula of Ribose is C₅H₁₀O₅. From the chemical formula of Ribose, you can find that one molecule of ribose has five Carbon (C) atoms, ten Hydrogen (H) atoms and five Oxygen (O) atoms.

Step 2: Find out atomic weights of each atom (from periodic table).

Atomic weight of Carbon (C): 12.0107 (Ref: Jlab-ele006)
Atomic weight of Hydrogen (H) : 1.008 (Ref: Lanl-1)
Atomic weight of Oxygen (O) : 15.9994 (Ref: Jlab-ele008)

Step 3: Calculate the total weight of each atom present in a Ribose molecule by multiplying its atomic weight by its number.

Number of Carbon atoms in Ribose: 5
Atomic weight of Carbon: 12.0107
Total weight of Carbon atoms in Ribose: 12.0107 x 5 = 60.0535

Number of Hydrogen atoms in Ribose: 10
Atomic weight of Hydrogen: 1.008
Total weight of Hydrogen atoms in Ribose: 1.008 x 10 = 10.080

Number of Oxygen atoms in Ribose: 5
Atomic weight of Oxygen: 15.9994
Total weight of Oxygen atoms in Ribose: 15.9994 x 5 = 79.997

Step 4: Calculate the molecular weight of Ribose by adding up the total weight of all atoms.

Molecular weight of Ribose: 60.0535 (Carbon) + 10.080 (Hydrogen) + 79.997 (Oxygen) = 150.1305

So the molecular weight of Ribose is 150.1305.

Ribose (C₅H₁₀O₅) Molecular Weight Calculation

REFERENCES:

• Lanl-1: https://periodic.lanl.gov/1.shtml 
• Pubchem-Hydrogen : https://pubchem.ncbi.nlm.nih.gov/element/Hydrogen 
• Jlab-ele006; https://education.jlab.org/itselemental/ele006.html
• Pubchem-6: https://pubchem.ncbi.nlm.nih.gov/element/6
• Jlab-ele008: https://education.jlab.org/itselemental/ele008.html
• Pubchem-8: https://pubchem.ncbi.nlm.nih.gov/element/8

See also:

• Deoxyribose (C5H10O4) Molecular Weight Calculation