CBSE Class 11-science Answered
what is molar mass ?tell me in brief
Asked by akash | 01 Apr, 2014, 09:23: AM
Expert Answer
In chemistry, the molar mass M is a physical property. It is defined as the mass of a given substance (chemical element or chemical compound) divided by its amount of substance. The base SI unit for molar mass is kg/mol. However, for historical reasons, molar masses are almost always expressed in g/mol.
As an example, the molar mass of water is approximately: M(H2O) ≈ 18 gmol−1
Molecular mass of hydrogen atom is 1
Molecular mass of oxygen atom is 16
Therefore, H + H + O = 1 + 1 + 16 = 18
Sometimes scientists use molecular mass as a synonym for molar mass.
Answered by | 01 Apr, 2014, 10:24: AM
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