Manipal MET2016ChemistrySome Basic Concepts of Chemistry

A silicon chip used in an integrated circuit of computer has a mass of 5.68 mg . The number of Si atoms present in this chip are

Options

A1.44 10²⁰ atoms
B18 10²⁰ atoms
C2.1 10²⁰ atoms
DNone of these

Correct answer

D. None of these

Step-by-step solution

Molar mass of silicon =28 ~g =28000 mg 28000 mg of silicon contain 6.022 10²³ atoms 5.68 mg of silicon contain 6.022 10²³ 28000 5.68 aligned & =0.00122 10²³ & =1.22 10²⁰ atoms aligned

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