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7 August, 21:22

Calculate the molar mass for sodium sulfate, N a2SO4. A sample of sodium sulfate with a mass of 300.0 g represents what number of moles of sodium sulfate?

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  1. 7 August, 22:26
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    300 grams of sodium sulfate represents 2.112 moles

    Explanation:

    Step 1: Data given

    Mass of Na2SO4 = 300.0 grams

    Step 2: Calculate the molar mass of Na2SO4

    Na = 22.99 g/mol

    S = 32.065 g/mol

    O = 16 g/mol

    Molar mass of Na2SO4 = 2*22.99 + 32.065 + 4*16

    Molar mass of Na2SO4 = 142.045

    Step 3: Calculate moles of Na2SO4

    Moles Na2SO4 = mass Na2SO4 / molar mass Na2SO4

    Moles Na2SO4 = 300.0 grams / 142.045 g/mol

    Moles Na2SO4 = 2.112 moles

    300 grams of sodium sulfate represents 2.112 moles
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