37) What is the difference between molecular mass and molar mass? Calculate the
molecular mass and molar mass for carbon monoxide.
With calculation explanation
Answers
Explanation:
The molecular mass is a relative mass of a molecule of a substance ( a compound or an element )measured by the ratio of the mass of one molecule of the substance to the mass of 112th part of 126C atom.
It is a unitless quantity,being the ratio of two masses.
The tiny constant mass of 112th part of the mass of 126C atom is also considered as unit of mass and is known as ‘amu’ or ‘u’.
1u or amu=1.6×10−24g=1Ng
Where N = Avogadro’s Number.
The molecular mass of Carbon dioxide =44
But actual mass of one molecule of carbon dioxide molecule is 44u
The molar mass of a substance (a compound or an element) is the mass of 1 mole or Avogadro’s number of the molecules of that substance expressed in gmol unit
The molar mass of carbon dioxide is 44gmol
Molecular mass and molar mass are the same thing. The thing actually is that the mass of one mole of any substance is its molar mass which is equivalent to its molecular mass. Thus, the molecular mass of CO2 is 44 grams.
calculation:
12.0107+15.9994*2
Molecular mass is the sum of the mass of the component atoms of a molecule. For most molecules this mass is in the range in 10power -27 to 10 power- 25 kg.
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