science

1. Liquid phosphorus trichloride, PCl3 is made by the direct combination of phosphorus and chlorine.
a. What is the maximum mass of PCl3 that can be produced from 125 g of P4 and 323 g Cl2?
b. What mass of P4 remains after the reaction?

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  1. balance the equation
    P4 + 6Cl2 >>> 4PCl3

    moles P4= 125/30.9 about 4
    moles Cl2= 323/70 about 4.5

    we need six moles Cl2 for each mole of P4, so we have an excess of P4.
    max moles P4 used: 323/(70*6)
    then convert that to mass

    mass remaining=125-max used

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    bobpursley

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