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12 July, 13:45

Element A has a mass of 0.444 grams and reacts with Element B via a combination reaction. The mass of the product is 0.988 grams. The molar mass of Element A is 111 g/mol and the molar mass of Element B is 68 g/mol. What is the empirical formula of the product.

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  1. 12 July, 14:13
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    AB2

    Explanation:

    The following data were obtained from the question:

    Mass of element A = 0.444 g

    Molar mass of element A = 111 g/mol

    Mass of the compound = 0.988 g

    Molar mass of Element B = 68 g/mol

    Next, we shall determine the mass of element B. This is shown below:

    Mass of element B = Mass of the compound - Mass of Element A

    Mass of element B = 0.988 - 0.444

    Mass of element B = 0.544 g

    Now, we can obtain the empirical formula for the compound formed as follow:

    A = 0.444

    B = 0.544

    Divide by their molar mass.

    A = 0.444/111 = 4*10¯³

    B = 0.544/68 = 8*10¯³

    Divide by the smallest

    A = 4*10¯³ / 4*10¯³ = 1

    B = 8*10¯³/4*10¯³ = 2

    Therefore, the empirical formula for the compound formed is AB2
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