Question

A massa molecular do pentano ( C5H12 ) é : dados C=12 u , H=1

a)70 u

b)72 u

c)71 u

d)17 u

e)62 U

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Answer 1

$\large\boxed{\begin{array}{l}\underline{\rm c\acute alculo~da~massa~molecular:}\\\sf m_{C_5H_{12}}=5\cdot12+12\cdot1=60+12=72~u\\\huge\boxed{\boxed{\boxed{\boxed{\boxed{\sf\maltese~alternativa~b}}}}}\end{array}}$