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AP EAMCET2005ChemistrySome Basic Concepts of Chemistry

x grams of calcium carbonate was completely burnt in air. The weight of the solid residue formed is 28 ~g . What is the value of x (in grams)?

Options

  1. A44
  2. B200
  3. C150
  4. D50

Correct answer

D. 50

Step-by-step solution

array lc CaCO ₃(s) CaO (s)+ CO ₂( ~g ) 40+12+48 & 40+16 =100 & =56 array 56 ~g CaO is obtained from =100 ~g CaCO ₃ 28 ~g CaO is obtained from = 100 28 56 =50 ~g CaCO ₃

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