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24 May, 01:04

Given the following equation: Cu + 2 AgNO3 - --> Cu (NO3) 2 + 2 Ag If 89.5 grams of Ag were produced, how many grams of Cu reacted?

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  1. 24 May, 01:24
    0
    mass of Cu = 26,34615g

    Explanation:

    The equation for reaction is

    Cu + 2 AgNO3 - --> Cu (NO3) 2 + 2 Ag

    1mol 2mol 1mol 2mol

    mass of Ag that reacted = 89.5g

    molar mass of Ag = 107.86h/mol

    number of moles = mass/molar mass

    number of moles of Ag = 89.5/107.86

    =0.8298moles

    from the stoichoimetric relation;

    1mol of Cu reacted to produce 2moles of Ag;

    hence 0.8298moles of Ag produce would require; 0.8298/2 moles of Cu to react

    =0.4149moles of Cu

    mass of Cu = moles of Cu * molar mass of Cu

    molar mass (Cu) = 63.5g

    mass of Cu = 0.4149 * 63.5

    mass of Cu = 26,34615g
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