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1 August, 22:47

A sample of sodium reacts completely with 0.284 kg of chlorine, forming 468 g of sodium chloride. What mass of sodium reacted?

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  1. 2 August, 01:33
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    mass of sodium reacted is 184.1 g

    Explanation:

    Na + Cl → NaCl

    mass Na = X = ?

    ∴ mass NaCl = 468 g

    ∴ mass Cl = 0.248 g

    ∴ molar mass NaCl = 58.44 g/mol

    ∴ atomic mass Cl = 35.453 a. m. u

    ∴ atomic mass Na = 22.989 a. m. u

    ⇒ moles Na = (X gNa) * (mol Na/22.989 g) = X/22.989 mol Na

    ⇒ mass NaCl = (X/22.989 mol Na) * (mol NaCl/mol Na) * (58.44 gNaCl/mol NaCl) = 468 g NaCl

    clearing "X":

    ⇒ ((58.44) (X)) / (22.989) = 468 g

    ⇒ X = 184.1 g = mass Na reacted
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