Question

Calculate the molecular mass of ethene (atomic mass of carbon is 12, and hydrogen is 1)

Answer 1

general formula of ethene is

C2H4

and molecular mass is

28

thanks for help

Answer 2

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

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