Question

The molar mass of K2S is 110.27 g/mol. What is the mass of 2.75 moles K2S? [?] g K₂S

Answer 1

The mass of 2.75 mol K₂S is 303.24 grams.

• Applying the mole concept:

      Number of moles(n) = given mass(m) / molar mass(M)

      n = m / M

• Now applying the formula for the number of moles-

       i.e. number of moles of K₂S = mass of K₂S / Molas mass of K₂S

      As per question, Molar mass of K₂S, M = 110.27 g/mol

      and, number of moles of K₂S, n  = 2.75 moles

• ∴ n = m / 110.27

        2.75 = m / 110.27

        m = 2.75 x 110.27

            = 303.24

     m    = 303.24 grams.

  Hence, the mass of 2.75 mol K₂S is 303.24 grams.

 To learn more about the mole concept, refer to:

  brainly.com/question/768852

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