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We know that one mole of any chemical compound always contains 6.022 x 10^23 molecules. Therefore, we can calculate the number of molecules of 2.25 moles of sulfur dioxide SO2 by multiplying the number of moles by the Avogadro's constant 6.022 x 10^23:     
     2.25 moles SO2 (6.022x10^23 molecules/1mole) = 1.355 x 10^24 molecules of sulfur dioxide
samueladesida43

There are 1.35 × 10²⁴ molecules of sulfur dioxide in 2.25 moles of sulfur dioxide.

HOW TO CALCULATE NUMBER OF MOLECULES:

  • The number of molecules of a substance can be calculated by multiplying the number of moles by Avogadro's number as follows:

  • no. of molecules = no. of moles × 6.02 × 10²³

  • According to this question, there are 2.25 moles of sulfur dioxide (SO2). The number of molecules can be calculated as follows:

  • no. of molecules = 2.25 × 6.02 × 10²³

  • no. of molecules = 13.545 × 10²³

  • no. of molecules = 1.354 × 10²⁴ molecules.

  • Therefore, there are 1.35 × 10²⁴ molecules of sulfur dioxide in 2.25 moles of sulfur dioxide.

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