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18 June, 15:22

how to write a conversion factor that relates moles of HCL to moles of NiCO3 to the reaction of hydrochloric acid reacts with some reacts with solid nickel carbonate

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  1. 18 June, 17:31
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    See below.

    Step-by-step explanation:

    We call this conversion factor the molar ratio.

    1. Start with the balanced equation

    NiCO₃ + 2HCl ⟶ NiCl₂ + H₂O + CO₂

    2. Note the coefficients of the substances

    The equation tells you that 1 mol of NiCO₃ reacts with 2 mol of HCl·

    Thus, the conversion factor is either (1 mol NiCO₃/2 mol HCl) or (2 mol HCl/1 mol NiCO₃).

    You choose the one that gives the correct units for the answer.

    For example, if the question was, "How many moles of HCl will react with x mol of NiCO₃," you would write

    x mol NiCO₃ * (2 mol HCl/1 mol NiCO₃) ⟶ 2x mol HCl

    Notice that putting "mol HCl" in the numerator and "mol NiCO₃" in the denominator cancels "mol NiCO₃" and gives you the desired units of "mol HCl" in the answer.
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