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NEET2024ChemistrySome Basic Concepts of ChemistryActual

A compound X contains 32 % of A, 20 % of B and remaining percentage of C . Then, the empirical formula of X is : (Given atomic masses of A=64 ; B=40 ; C=32 u )

Options

  1. AABC ₃
  2. BAB ₂ C ₂
  3. CABC ₄
  4. DA ₂ BC ₂

Correct answer

A. ABC ₃

Step-by-step solution

array |c|c|c|c|c| Element & array c Mass percentage % array & array c No. of moles array & array c No. of moles / Smallest number array & array c Simplest whole number array A & 32 % & 32 64 = 1 2 & 1 2 2 & =1 B & 20 % & 20 40 = 1 2 & 1 2 2 & =1 C & 48 % & 48 32 = 3 2 & 3 2 2 & =3 array So, empirical formula of X= array clll A & : & B & C 1 & : & 1 & : array The correct empirical formula of compound X is ABC ₃

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