MCAT Question of the Day
    •

    Q:

    		 The oxygen-evolving reaction Ca(OCl)2 (s) → CaCl2 (s) + O2 (g) is initiated with 71 g of Ca(OCl)2 in a 5.5 L sealed chamber with an unknown amount of inert gas. If the resulting oxygen evolved increases the pressure of the chamber by 20%, how many moles of gas were in the chamber initially? Assume all gases are ideal and the temperature of the reaction remains constant.
    		 

    A

    		 0.5 moles

    B

    		 2.5 moles

    C

    		 3 moles

    D

    		 11.2 moles



    Stoichiometry | Quantitative Skills |
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