Question

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Calculate the molecular mass of Ethene (atomie mass
of carbon 12
atomie mass of hydrogen is 1)
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Answer 1

Hope it helps..............

Answer 2

Answer:

Molecular mass is a number equivalent to the whole of the nuclear masses of the particles in an atom.

The molecular mass gives the mass of a particle in respect to that of the 12C molecule, which is taken to have a mass of 12.

Molecular mass is a dimensionless amount, condensed formula of ethene = CH2=CH2

so, chemical formula of ethene = C2H4

THUS, MOLECULAR MASS = 2×(Atomic mass of C) + 4× ( Atomic mass of Hydrogen)

= 2×12 + 4×1

= 24+4

= 28 amu