Determine the empirical formula of Kelvar, used in making bullet proof vests, is 70.6% C,4.2% H, 11.8% N and 13.4% O :

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C7H5NO2

C7H5N2O

C7H9NO

C7H5NO

answer is D.

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Detailed Solution

CHNOMoles70.6124.2111.81413.416Moles5.880.844.20.840.8420.840.840.84Simple ratio7511